Touch display panel and electronic device

ABSTRACT

A touch display panel, includes: a base substrate, and a display structure and a touch structure that are stacked on the base substrate, the touch structure includes a first metal mesh layer, an orthographic projection of a mesh hole of at least one first metal mesh of the first metal mesh layer on the base substrate covers orthographic projections of two pixel opening regions of two adjacent sub-pixels on the base substrate, and the two adjacent sub-pixels are configured to emit light of a first primary color; and a center distance between two pixel opening regions is smaller than a center distance between two pixel opening regions of two sub-pixels emitting light of same one other primary color, which is different to the first primary color.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority of PCT International ApplicationNo. PCT/CN/2020/073237, filed on Jan. 20, 2020, and the entire contentdisclosed by the PCT international application is incorporated herein byreference as part of the present application.

TECHNICAL FIELD

The embodiments of the present disclosure relate to a touch displaypanel and an electronic device.

BACKGROUND

A user interface with a touch function is widely used in variouselectronic devices, such as display devices. A touch structure used toimplement the touch function includes a touch electrode structure, andthe setting of the touch electrode structure is an important factor thataffects user experience.

SUMMARY

At least one embodiment of the present disclosure discloses a touchdisplay panel, which comprises: a base substrate, and a displaystructure and a touch structure that are stacked on the base substrate;the display structure comprises a plurality of sub-pixels, the pluralityof sub-pixels are arranged along a first direction and a seconddirection, and each of the plurality of sub-pixels comprises alight-emitting element and a pixel opening region exposing thelight-emitting element; the first direction and the second directionintersect; the touch structure comprises a first metal mesh layer, thefirst metal mesh layer comprises a plurality of first metal meshesdefined by a plurality of first metal lines, and orthographicprojections of the plurality of first metal lines on the base substrateare located outside orthographic projections of a plurality of pixelopening regions of the plurality of sub-pixels on the base substrate; anorthographic projection of a mesh hole of each of at least one firstmetal mesh on the base substrate covers orthographic projections of twopixel opening regions of two adjacent sub-pixels on the base substrate,and the two adjacent sub-pixels are two first sub-pixels, and areconfigured to emit light of a first primary color; and a center distancebetween the two pixel opening regions of the two first sub-pixels issmaller than a center distance between two pixel opening regions of twosub-pixels emitting light of same one other primary color, which isdifferent to the first primary color.

In some examples, areas of the two pixel opening regions of the twofirst sub-pixels are equal and smaller than an area of a pixel openingregion of a sub-pixel that emits light of other primary color.

In some examples, the plurality of sub-pixels are in a plurality ofpixel units, and each of the plurality of pixel units is configured toemit light of full-color; and the two first sub-pixels belong to twopixel units, respectively.

In some examples, each sub-pixel emitting light with a color differentfrom the first primary color is configured to be shared by at least twopixel units, respectively.

In some examples, the first primary color is green.

In some examples, each of orthographic projections of mesh holes ofother first metal meshes, which are directly connected to the at leastone first metal mesh, on the base substrate, covers only an orthographicprojection of a pixel opening region of one sub-pixel on the basesubstrate.

In some examples, the plurality of first metal meshes are arranged alongthe first direction and the second direction; and each of the pluralityof first metal meshes is hexagonal, and extension directions of longestsides of respective first metal meshes are parallel to each other andare all along the second direction.

In some examples, a pixel opening region contour of a pixel openingregion corresponding to each first metal mesh is hexagonal, and sixsides of each first metal mesh are respectively parallel to six sides ofthe pixel opening region contour corresponding to each first metal mesh;two sides, which are close to each other, of two adjacent pixel openingregion contours are parallel to each other, and a first metal line isbetween the two sides; and orthographic projections of the two sides,which are close to each other, of the two adjacent pixel opening regioncontours on the base substrate are both parallel to an orthographicprojection of the first metal line on the base substrate, and a distancebetween one of the orthographic projections of the two sides and theorthographic projection of the first metal line on the base substrateand a distance between other of the orthographic projections of the twosides and the orthographic projection of the first metal line on thebase substrate are identical.

In some examples, an average line width of the first metal line and adistance between the two adjacent pixel opening region contourssatisfies a following relationship:

(PDLGAPmax−PDLGAPmin)*0.5<X<PDLGAPmax*0.167,

where X is the average line width of the first metal line, and PDLGAPmaxand PDLGAPmin are a maximum value and a minimum value of the distancebetween the two adjacent pixel opening region contours, respectively.

In some examples, the plurality of sub-pixels further comprise a secondsub-pixel and a third sub-pixel, the second sub-pixel is configured toemit light of a second primary color, and the third sub-pixel isconfigured to emit light of a third primary color, an area of a pixelopening region of the first sub-pixel, an area of a pixel opening regionof the second sub-pixel, and an area of a pixel opening region of thethird sub-pixel sequentially increase; a contour of pixel openingregions of the two first sub-pixels, which are adjacent, is a firstpixel opening region contour, a pixel opening region contour of thesecond sub-pixel is a second pixel opening region contour, and a pixelopening region contour of the third sub-pixel is a third pixel openingregion contour; and a maximum value of a distance between two adjacentpixel opening region contours is a distance between a second pixelopening region contour and a third pixel opening region contour, whichare adjacent in a third direction, and the third direction is neitherparallel nor perpendicular to the second direction.

In some examples, a first metal mesh corresponding to the second pixelopening region contour comprises a first side and a second side, whichare adjacent, the first side is neither parallel nor orthogonal to thesecond direction, and the second side is neither parallel nor orthogonalto the second direction; the first side is between the second pixelopening region contour and the first pixel opening region contour, andthe second side is located between the second pixel opening regioncontour and the third pixel opening region contour; and the first sideis longer than the second side.

In some examples, the first metal mesh layer comprises a plurality offirst touch sub-electrodes and a plurality of first connectionelectrodes arranged along the first direction, the plurality of firsttouch sub-electrodes and the plurality of first connection electrodesare alternately distributed one by one and electrically connected insequence to form a first touch electrode extending along the firstdirection; the first metal mesh layer further comprises a plurality ofsecond touch sub-electrodes arranged sequentially along the seconddirection and spaced apart from each other; and each of the plurality offirst touch sub-electrodes and each of the second touch sub-electrodesare spaced apart from each other, and each of the plurality of firsttouch sub-electrodes and each of the second touch sub-electrodescomprise a plurality of first metal meshes, respectively.

In some examples, the touch structure further comprises a second metalmesh layer, and the first metal mesh layer and the second metal meshlayer are separated by an insulation layer between the first metal meshlayer and the second metal mesh layer; the second metal mesh layercomprises a plurality of second metal meshes defined by a plurality ofsecond metal lines, and orthographic projections of the plurality ofsecond metal lines on the base substrate are located outside theorthographic projections of the plurality of pixel opening regions ofthe plurality of sub-pixels on the base substrate; the second metal meshlayer comprises a plurality of second connection electrodes spaced apartfrom each other, and each of the plurality of second connectionelectrodes is electrically connected to adjacent second touchsub-electrodes through a plurality of holes in the insulation layer,thereby electrically connecting the adjacent second touch sub-electrodesto form a second touch electrode extending in the second direction.

In some examples, a plurality of second metal lines of at least twosecond metal meshes in each of the plurality of second connectionelectrodes respectively overlap with a plurality of first metal lines ofat least two first metal meshes in an adjacent second touchsub-electrode in a direction perpendicular to the base substrate, sothat the at least two first metal meshes have a plurality of verticesoverlapping with the at least two second metal meshes, each of theplurality of holes is at a vertex, and the vertex is called a connectionvertex.

In some examples, at most one vertex among vertices adjacent to eachconnection vertex is a connection vertex.

In some examples, vertices adjacent to each connection vertex are notconnection vertices.

In some examples, the at least two second metal meshes are edge metalmeshes of the second connection electrode, and the at least two firstmetal meshes are edge metal meshes of the second touch electrode.

In some examples, adjacent second touch sub-electrodes are electricallyconnected through two second connection electrodes, and the two secondconnection electrodes are spaced apart from each other and aresymmetrical with respect to a central axis extending in the seconddirection.

In some examples, an orthographic projection of each of the plurality offirst connection electrodes on the second metal mesh layer is in a gapbetween the two second connection electrodes between adjacent secondtouch sub-electrodes; and each of the plurality of first touchsub-electrodes is electrically connected to an adjacent first connectionelectrode through at least one connection line comprising a plurality offirst metal lines that are sequentially connected end to end.

In some examples, the plurality of first metal lines that aresequentially connected end to end respectively overlap with a pluralityof second metal lines in the second connection electrode in a directionperpendicular to the base substrate.

In some examples, an average line width of the first metal line isgreater than an average line width of the second metal line.

In some examples, a plurality of first metal lines in a boundary regionbetween a first touch sub-electrode and a second touch sub-electrode,which are adjacent, respectively comprise a plurality of spaces, eachspace of the plurality of spaces divides a first metal line, where theeach space is located, into two first metal line segments, one of thetwo first metal line segments belongs to the first touch sub-electrode,the other one of the two first metal line segments belongs to the secondtouch sub-electrode, so that the first touch sub-electrode and thesecond touch sub-electrode, which are adjacent, are insulated.

In some examples, the plurality of spaces comprises a plurality of firstspaces on a straight line, and the plurality of first spaces arerespectively on a plurality of first metal lines orthogonal to thestraight line; and at least one first metal line is between at least twofirst spaces, and the at least one first metal line intersects thestraight line, and there is no space at an intersection of the at leastone first metal line and the straight line.

In some examples, the first metal mesh layer comprises a plurality offirst touch electrodes along the second direction; at least one firstmetal mesh comprises three first metal mesh parts insulated from eachother, and the three first metal mesh parts respectively belong to threetouch sub-electrodes that are insulated from each other, the three touchsub-electrodes comprise two first touch sub-electrodes that are adjacentin the second direction and a second touch sub-electrode between the twofirst touch sub-electrodes, or comprise two second touch sub-electrodesthat are adjacent in the first direction and a first touch sub-electrodebetween the two second touch sub-electrodes.

At least one embodiment of the present disclosure further provides anelectronic device, which comprises the touch display panel provided byany of the above embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to clearly illustrate the technical solutions of theembodiments of the present disclosure, the drawings of the embodimentswill be briefly described in the following; it is obvious that thedescribed drawings are only related to some embodiments of the presentdisclosure and thus are not limitative to the present disclosure.

FIG. 1A is a schematic diagram of a pixel arrangement of a displaystructure provided by at least one embodiment of the present disclosure;

FIG. 1B is a schematic diagram of a display structure provided by atleast one embodiment of the present disclosure;

FIG. 1C is a cross-sectional view of FIG. 1B along a section line A-A′;

FIG. 1D is a schematic diagram of a display structure provided byanother embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a pixel arrangement of a displaystructure provided by other embodiments of the present disclosure;

FIG. 3A is a first schematic diagram of a touch structure provided by atleast one embodiment of the present disclosure;

FIG. 3B is a second schematic diagram of a touch structure provided byat least one embodiment of the present disclosure;

FIGS. 4A and 4B are third schematic diagrams of a touch structureprovided by at least one embodiment of the present disclosure;

FIG. 5A is a fourth schematic diagram of a touch structure provided byat least one embodiment of the present disclosure;

FIG. 5B is a cross-sectional view of FIG. 5A along a section line B-B′;

FIG. 5C is a fifth schematic diagram of a touch structure provided by atleast one embodiment of the present disclosure;

FIG. 5D is a cross-sectional view of FIG. 5A along a section line D-D′;

FIG. 5E is a sixth schematic diagram of a touch structure provided by atleast one embodiment of the present disclosure;

FIG. 6A is a seventh schematic diagram of a touch structure provided byat least one embodiment of the present disclosure;

FIG. 6B is an eighth schematic diagram of a touch structure provided byat least one embodiment of the present disclosure;

FIG. 7A is a schematic diagram of a metal line space design;

FIG. 7B is a simulation diagram of a shadow elimination design of atouch structure provided by an embodiment of the present disclosure;

FIG. 8 is a ninth schematic diagram of a touch structure provided by atleast one embodiment of the present disclosure;

FIG. 9 is a tenth schematic diagram of a touch structure provided by atleast one embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a touch structure provided by at leastone embodiment of the present disclosure; and

FIG. 11 is a schematic diagram of an electronic device provided by atleast one embodiment of the present disclosure.

DETAILED DESCRIPTION

The following will clearly and completely describe the technicalsolutions in the embodiments of this disclosure with reference to thenon-limiting example embodiments shown in the drawings and detailed inthe following description, and more fully explain the exampleembodiments of the present disclosure and their various features andadvantageous details. It should be noted that the features shown in thefigures are not necessarily drawn to scale. The present disclosure omitsdescriptions of known materials, components, and process techniques soas not to obscure example embodiments of the present disclosure. Theexamples given are only intended to facilitate understanding of theimplementation of the exemplary embodiments of the present disclosureand further enable those skilled in the art to implement the exemplaryembodiments. Therefore, these examples should not be understood aslimiting the scope of the embodiments of the present disclosure.

Unless otherwise defined, all the technical and scientific terms usedherein have the same meanings as commonly understood by one of ordinaryskill in the art to which the present disclosure belongs. The terms“first,” “second,” etc., which are used in the present disclosure, arenot intended to indicate any sequence, amount or importance, butdistinguish various components. Furthermore, in various embodiments ofthe present disclosure, the same or similar reference numerals refer tothe same or similar components.

Organic light-emitting diode (OLED) display panels have thecharacteristics of self-luminescence, high contrast, low energyconsumption, wide viewing angle, fast response speed, capable of beingapplied to flexible panels, wide operating temperature range, simplemanufacturing, etc., and have a broad development prospect. In order tomeet the diverse needs of users, it is of great significance tointegrate a plurality of functions in the display panel, such as a touchfunction, a fingerprint recognition function, and the like. For example,forming an on-cell touch structure in an OLED display panel is animplementation method, and the method achieves the touch function of thedisplay panel by forming the touch structure on an encapsulation film ofthe OLED display panel.

For example, a mutual-capacitive touch structure includes a plurality oftouch electrodes, and the plurality of touch electrodes include touchdriving electrodes and touch sensing electrodes extending in differentdirections, and the touch driving electrodes and the touch sensingelectrodes form mutual capacitors for touch sensing at portions wherethe touch driving electrodes and the touch sensing electrodes cross eachother. The touch driving electrodes are used to input excitation signals(touch driving signals), and the touch sensing electrodes are used tooutput touch sensing signals. By inputting the excitation signal to, forexample, the touch driving electrode longitudinally extending, andreceiving the touch sensing signal from, for example, the touch sensingelectrode laterally extending, a detection signal reflecting acapacitance value of a coupling point (for example, the cross point) ofthe horizontal electrode and the vertical electrode can be obtained. Inthe case where the finger touches the capacitive screen, the fingeraffects the coupling between the touch driving electrode and the touchsensing electrode near the touch point, thereby changing the capacitanceof the mutual capacitor at the intersection point between the twoelectrodes, resulting in a change in the touch sensing signal. Accordingto the data of the two-dimensional capacitance change of the touchscreen based on the touch sensing signal, the coordinates of the touchpoint can be calculated.

A touch electrode is formed by a metal mesh pattern. The metal mesh hasgood ductility and flexibility, can improve the bending resistance andworkability of the touch electrode, and is suitable for flexibleelectronic applications.

For example, in the case where the touch electrode formed by the metalmesh is integrated into the display panel, the metal lines in the metalmesh need to be arranged outside the pixel opening regions of thedisplay panel to prevent the metal lines from blocking the light andavoid causing the pixel aperture ratio to decrease. For example, themetal lines in the metal mesh are arranged corresponding to the pixelspacing regions among the pixel opening regions, and mesh holes in themetal mesh are arranged in one-to-one correspondence with the pixelopening regions to expose the light-emitting elements of respectivesub-pixels.

The inventor found that, for example, interval distances of respectivesub-pixels in a display panel are not uniform. In the case where aninterval distance between two sub-pixels is close, the metal linecorrespondingly provided between the two sub-pixels will be closer tothe pixel opening regions of the sub-pixels, which is likely toadversely affect the display function of the two sub-pixels, forexample, under oblique viewing, the metal line blocks the light emittedby the sub-pixels, reflects the light emitted by the sub-pixels to causeproblems, such as cross-color. In addition, if the area of the pixelopening region of the sub-pixel is small, the adverse effect will bemore obvious.

At least one embodiment of the present disclosure provides a touchdisplay panel, including a base substrate, and a display structure and atouch structure that are stacked on the base substrate, an orthographicprojection of a mesh hole of each of at least one first metal mesh onthe base substrate covers orthographic projections of two pixel openingregions of two adjacent sub-pixels on the base substrate, and the twoadjacent sub-pixels are two first sub-pixels, and are configured to emitlight of a first primary color; a center distance between the two pixelopening regions of the two first sub-pixels is smaller than a centerdistance between two pixel opening regions of two sub-pixels emittinglight of the same one other primary color, which is different to thefirst primary color.

It should be noted that the aforementioned “center” refers to thegeometric center of the planar shape, which is parallel to the basesubstrate, of the pixel opening region.

The pixel opening regions of two sub-pixels with a relatively smallinterval distance are arranged to share one mesh hole, that is, themetal line between the two pixel opening regions is removed, so that themetal lines in the metal mesh have a sufficient distance away from thepixel opening region, thereby avoiding adverse effects on the displaycaused by the metal line being relatively close to the pixel openingregion, and effectively improving the display effect.

Because the two adjacent sub-pixels emit light of the same color, thepixel opening regions of the two adjacent sub-pixels can be closerwithout causing the problem of cross-color; in addition, for example, inthe case where the organic light-emitting diode is prepared by aprecision metal mask (FMM) evaporation process, one evaporation hole canbe used to form the light-emitting layers of the two sub-pixels, therebyreducing the difficulty of the manufacturing process. For example, thelight-emitting layers of the two sub-pixels are connected to each otherto be as an integral structure.

For example, the areas of the pixel opening regions of the twosub-pixels are equal and smaller than the area of the pixel openingregion of the sub-pixel emitting light of other primary color, which isdifferent to the first primary color.

In order to improve the display resolution, the conventional mode, inwhich the red sub-pixel, the green sub-pixel, and the blue sub-pixel areused to simply define a pixel, can changed, it can use a relativelysmall number of sub-pixels to simulate the performance capability of thesame pixel resolution, thereby reducing the difficulty of themanufacturing process and the manufacturing cost. For example, in somepixel arrangements, the pixel structure includes a plurality of firstsub-pixels, a plurality of second sub-pixels, and a plurality of thirdsub-pixels. The first sub-pixels are configured to emit light of a firstprimary color, and the second sub-pixels are configured to emit light ofa second primary color, and the third sub-pixels are configured to emitlight of a third primary color. Each pixel unit includes a firstsub-pixel; each sub-pixel emitting light of a color different from thefirst primary color, that is, each second sub-pixel and each thirdsub-pixel are respectively shared by at least two pixel units; eachpixel unit is configured to emit light of full-color. Because each pixelunit includes a first sub-pixel, the density of the first sub-pixels isthe highest.

Because the second sub-pixel and the third sub-pixel in each pixel unitare shared by adjacent pixel units, the pixel unit in the embodiments ofthe present disclosure is not a pixel unit in a strict sense, that is, apixel is defined by a first sub-pixel, a second sub-pixel, and a thirdsub-pixel. Therefore, the pixel unit can be referred to as a virtualpixel unit.

For example, the plurality of pixel units are arranged in an arrayaccording to a first direction and a second direction, the firstdirection and the second direction are different directions, forexample, the first direction and the second direction are orthogonal toeach other. For example, in the first direction of the pixel array andin the second direction of the pixel array, the density of thesub-pixels is 1.5 times the density of the pixel units.

For example, using the difference in the resolution of sub-pixels ofdifferent colors by the human eye, different pixels can share some colorsub-pixels, position resolutions of which are not sensitive. Forexample, the first primary color is green, the second primary color isred, and the third primary color is blue.

For example, according to the physiological structure of the human eye,the resolution of the human eye is determined by the density ofrod-shaped photoreceptor cells that are sensitive to brightness andcone-shaped photoreceptor cells that are sensitive to color in theretina of the human eye. Among the three primary colors, the density ofthe cone-shaped cells that are sensitive to short-wavelength blue is thelowest, the density of the cone-shaped cells that are sensitive to redis second. In addition, the brightness effect of blue and red (stimulusto the rod-shaped cells that are sensitive to brightness) is much lowerthan the brightness effect of green, which results in the sensitivity ofthe human eye to the blue sub-pixel and the red sub-pixel issignificantly lower than the sensitivity of the green sub-pixel. At acertain pixel resolution, although the human eye can distinguish thebrightness center position of the pixel and have a normal sense ofcolor, however, the human eye cannot distinguish the position orboundary of the blue or red sub-pixel on the pixel scale, so that it ispossible to share adjacent blue and red sub-pixels between adjacentpixels to a certain extent.

For example, the sub-pixels in the present disclosure are pixelstructures corresponding to light-emitting elements in a one-to-onecorrespondence manner, and have independent pixel driving circuits.

For example, the touch display panel may be a liquid crystal displaypanel, an organic light-emitting diode display panel, a quantum dotlight-emitting diode display panel, or an electronic paper displaypanel, etc., and the embodiments of the present disclosure are notlimited to the type of the display panel.

Hereinafter, the touch display panel provided by the embodiments of thepresent disclosure will be exemplarily described by taking the firstprimary color as green and the touch display panel being an organiclight-emitting diode display panel as an example, but the embodiments ofthe present disclosure are not limited thereto.

FIG. 1A shows a schematic diagram of a pixel arrangement provided by atleast one embodiment of the present disclosure. As shown in FIG. 1A, thepixel arrangement structure includes a plurality of sub-pixels, and theplurality of sub-pixels are arranged in a first direction D1 and asecond direction D2. The first direction D1 and the second direction D2are different directions, for example, are orthogonal to each other. Theplurality of sub-pixels comprise a plurality of first sub-pixels, aplurality of second sub-pixels, and a plurality of third sub-pixels. Forexample, the first sub-pixel is a green (G) sub-pixel 11, the secondsub-pixel is a red (R) sub-pixel 12, and the third sub-pixel is a blue(B) sub-pixel 13; each pixel unit 10 includes a green sub-pixel 11, andeach red sub-pixel 12 and each blue sub-pixel 13 are respectively sharedby two adjacent pixel units 10, so that the boundary of the pixel unit10 is also very blurred. The embodiments of the present disclosure arenot limited to the shape of the pixel unit 10. In FIGS. 1A and 1B, thepixel unit 10 is exemplarily indicated by a dotted circle. The pluralityof pixel units 10 are arranged in an array along the first direction D1and the second direction D2.

For example, as shown in FIG. 1A, the plurality of green sub-pixels 11are arranged in pairs, two green sub-pixels 11 in each pair are adjacentto each other, and an interval distance between adjacent greensub-pixels is smaller than an interval distance between two sub-pixelsemitting light of the same one other color, that is, is smaller than aninterval distance between the red sub-pixel 12 and the blue sub-pixel13, is also smaller than an interval distance between the greensub-pixel 11 and the red sub-pixel 12, and is smaller than an intervaldistance between the green sub-pixel 11 and the blue sub-pixel 13. Forexample, green sub-pixels in a pair 11 are arranged along the seconddirection D2.

For example, a red sub-pixel 12 and a blue sub-pixel 13 are arrangedbetween two green sub-pixel pairs adjacent in the second direction D2,and the red sub-pixel 12 and the blue sub-pixel 13 are arranged alongthe first direction D1.

FIG. 1B shows a touch display panel provided by at least one embodimentof the present disclosure, a display structure in the touch displaypanel adopts the pixel arrangement structure shown in FIG. 1A; and FIG.1C is a cross-sectional view of FIG. 1B along a section line A-A′.

Referring to FIG. 1B and FIG. 1C, the touch display panel 20 includes abase substrate 21 and a display structure 30 and a touch structure 40that are stacked on the base substrate 21. The touch structure 40 islocated on the display structure 30, and is closer to an user side in anused process.

For example, the touch display panel is an OLED display panel, and thedisplay structure 30 includes a plurality of sub-pixels, and theplurality of sub-pixels includes the green sub-pixel 11, the redsub-pixel 12, and the blue sub-pixel 13 described above. Each sub-pixelincludes a light-emitting element 23 and a pixel driving circuit thatdrives the light-emitting element 23 to emit light. The embodiments ofthe present disclosure are not limited to the type and specificcomposition of the pixel driving circuit. For example, the pixel drivingcircuit may be a current driving type or a voltage driving type, and maybe a 2T1C (that is, two transistors and one capacitor, the twotransistors includes a driving transistor and a data writing transistor)driving circuit, may be a driving circuit that further includes acompensation circuit (compensation transistor), a light-emitting controlcircuit (light-emitting control transistor), a reset circuit (resettransistor), etc., based on 2T1C.

For the sake of clarity, FIG. 1C only shows the first transistor 24directly electrically connected to the light-emitting element 23 in thepixel driving circuit. The first transistor 24 may be a drivingtransistor and is configured to work in a saturated state and controlthe magnitude of a current that drives the light-emitting element 23 toemit light. For example, the first transistor 24 may also be alight-emitting control transistor, which is used to control whether acurrent for driving the light-emitting element 23 to emit light flows ornot. The embodiments of the present disclosure are not limited to thespecific type of the first transistor.

For example, the light-emitting element 23 is an organic light-emittingdiode, and includes a first electrode 231, a light-emitting layer 233,and a second electrode 232. One of the first electrode 231 and thesecond electrode 232 is an anode, and the other of the first electrode231 and the second electrode 232 is a cathode; for example, the firstelectrode 231 is an anode, and the second electrode 232 is a cathode.For example, the light-emitting layer 233 is an organic light-emittinglayer or a quantum dot light-emitting layer. For example, in addition tothe light-emitting layer 233, the light-emitting element 23 may alsoinclude auxiliary functional layers, such as a hole injection layer, ahole transport layer, an electron injection layer, and an electrontransport layer. For example, the light-emitting element 23 has a topemission structure, the first electrode 231 has reflectivity and thesecond electrode 232 has transmissivity or semi-transmissivity. Forexample, the first electrode 231 is formed of a high work functionmaterial to serve as an anode, such as an ITO/Ag/ITO laminatedstructure; the second electrode 232 is formed of a low work functionmaterial to serve as a cathode, such as a semi-transmissive metal ormetal alloy material, such as an Ag/Mg alloy material.

The first transistor 24 includes a gate electrode 241, a gate insulationlayer 242, an active layer 243, a first electrode 244, and a secondelectrode 245, and the second electrode 245 is electrically connected tothe first electrode 231 of the light-emitting element 23. Theembodiments of the present disclosure are not limited to the type,material, and structure of the first transistor 24, for example, thefirst transistor 24 may be a top gate type, a bottom gate type, etc.,the active layer 243 of the first transistor 24 may be amorphoussilicon, polysilicon (low temperature polysilicon and high temperaturepolysilicon), oxide semiconductor (for example, indium gallium tin oxide(IGZO)), etc., and the first transistor 24 may be N-type or P-type.

The transistors used in the embodiments of the present disclosure may bethin film transistors, field effect transistors, or other switchingdevices with the like characteristics, and the embodiments of thepresent disclosure are described by taking thin film transistors as anexample. A source electrode and a drain electrode of the transistor usedherein may be symmetrical in structure, so the source electrode and thedrain electrode of the transistor may have no difference in structure.In the embodiments of the present disclosure, in order to distinguishtwo electrodes of the transistor apart from a gate electrode, one of thetwo electrodes is directly referred to as a first electrode, and theother of the two electrodes is referred to as a second electrode.

Referring to FIG. 1B and FIG. 1C, the display structure 30 furtherincludes a pixel defining layer 32, the pixel defining layer 32 isdisposed on the first electrode 231 of the light-emitting element 23, aplurality of openings 320 are formed in the pixel defining layer 32 torespectively expose the first electrodes 231 of a plurality ofsub-pixels, thereby defining the pixel opening region of each sub-pixel.The light-emitting layer of the sub-pixel is formed in the pixel openingregion, and the second electrode 232 is formed as a common electrode(that is, shared by the plurality of sub-pixels); the pixel defininglayer 32 includes a pixel opening region 110 of the green sub-pixel 11(the first sub-pixel), a pixel opening region 120 of the red sub-pixel12 (the second sub-pixel), and a pixel opening region 130 of the bluesub-pixel 13 (the third sub-pixel).

The touch structure 40 includes a first metal mesh layer 50. The firstmetal mesh layer 50 includes a plurality of first metal meshes 52defined by a plurality of first metal lines 51, orthographic projectionsof the plurality of first metal lines 51 on the base substrate 21 arelocated outside orthographic projections of the pixel opening regions ofthe plurality of sub-pixels on the base substrate 21, that is, fallsinto the orthographic projections of the pixel separation regions amongthe pixel opening regions on the base substrate 21, and the pixelseparation regions are also non-opening regions 321 of the pixeldefining layer 32. The pixel separation regions are used to separate thepixel opening regions of the plurality of sub-pixels, separate thelight-emitting layers of the respective sub-pixels, and preventcross-color.

As shown in FIG. 1B, an orthographic projection of a mesh hole 520 of atleast one first metal mesh 52 on the base substrate 21 coversorthographic projections of two pixel opening regions 100 of twoadjacent green sub-pixels 11 (that is, a green sub-pixel pair) on thebase substrate, that is, there is no first metal line 51 correspondinglyprovided between the two pixel opening regions 110.

As shown in FIG. 1B, the center distance Si between the pixel openingregions 110 of the two adjacent green sub-pixels 11 is smaller than thecenter distance between the two pixel opening regions of the twosub-pixels emitting light of the same one other primary color. Forexample, the center distance S1 between the pixel opening regions 110 ofthe two adjacent green sub-pixels 11 is smaller than the center distanceS2 between the pixel opening regions 120 of the two adjacent redsub-pixels 12, or the center distance S3 between the pixel openingregions 130 of the two adjacent blue sub-pixels 13.

For example, the center distance between the pixel opening regions 110of the two adjacent green sub-pixels 11 is smaller than the centerdistance between the pixel opening region 110 of one green sub-pixel 11and the pixel opening region of the sub-pixel of other color, which isadjacent to the one green sub-pixel 11. As shown in FIG. 1B, the centerdistance between the pixel opening regions 110 of the two adjacent greensub-pixels 11 is smaller than the center distance S4 between the pixelopening region 110 of the green sub-pixel 11 and the pixel openingregion 120 of the red sub-pixel 12 that is adjacent to the greensub-pixel 11, and is also smaller than the center distance S5 betweenthe pixel opening region 110 of the green sub-pixel 11 and the pixelopening region 130 of the blue sub-pixel 13 that is adjacent to thegreen sub-pixel 11.

For example, as shown in FIG. 1B, each of the orthographic projectionsof the mesh holes 520 of the other first metal meshes 52 directlyconnected to the first metal mesh 52 on the base substrate 21 onlycovers the orthographic projection of the pixel opening region of onesub-pixel on the base substrate. This is because the sub-pixels adjacentto the green sub-pixel pair are all sub-pixels of other colors, and theinterval distance between the pixel opening region of the sub-pixel ofother color and the pixel opening region of the sub-pixel that isadjacent to the sub-pixel of other color is relatively large, and thepixel opening regions are arranged in one-to-one correspondence with thefirst metal meshes 52, which can increase the density of touchelectrodes, thereby increasing the sensitivity of touch.

For example, in the case where an organic light-emitting diode isprepared by a precision metal mask (FMM) evaporation process, oneevaporation hole can be used to form the light-emitting layers of thetwo sub-pixels, thereby reducing the difficulty of the manufacturingprocess.

As shown in FIG. 1B, the plurality of first metal meshes 52 are arrangedalong the first direction D1 and the second direction D2. For example, ashape of each first metal mesh 52 is a polygon, for example, a hexagon;each first metal mesh 51 includes two sides that extend in the seconddirection D2 and are opposite to each other, and the lengths of the twosides may be the same or different, the two sides include the longestside of the first metal mesh 52, that is, the longest side of each firstmetal mesh is parallel to the second direction D2. For example, the sixsides of the first metal mesh 52 include three pairs of sides, sides ineach pair are opposite to each other, for example, sides, which areopposite to each other, in each pair of sides are parallel to eachother; for another example, except for sides, which are parallel to thesecond direction D2, in a pair of sides, the sides, which are oppositeto each other, of each of the other two pairs of sides are not parallelto each other.

As shown in FIG. 1B, for example, the shapes of the pixel openingregions of the green sub-pixel 11, the red sub-pixel 12, and the bluesub-pixel 13 are all polygons; for example, the shape of the pixelopening region of the red sub-pixel 12 and the shape of the pixelopening region of the blue sub-pixel 13 are both hexagons, and the shapeof the pixel opening region of the green sub-pixel 11 is a pentagon.

A pixel opening region contour of a pixel opening region correspondingto each first metal mesh 52 (that is, the pixel opening region coveredby the mesh hole of the first metal mesh) is shown by a dotted line inFIG. 1B. For example, the pixel opening regions 110 of two greensub-pixels 11 arranged in a pair are arranged side by side in the seconddirection, share a mesh hole 520 of a first metal mesh 52, the outercontours of the two pixel opening regions 110 are called the first pixelopening region contours 115, the pixel opening region contour of the redsub-pixel is the second pixel opening region contour 125, and the pixelopening region contour of the third sub-pixel is the third pixel openingregion contour 135, the first pixel opening region contour 115, thesecond pixel opening region contour 125, and the third pixel openingregion contour 135 are all hexagons and are adjacent to each other inpairs.

For example, the six sides of each first metal mesh are parallel to thesix sides of the corresponding pixel opening region contour,respectively.

For example, two sides, which are close to each other, of two adjacentpixel opening region contours are parallel to each other, and a firstmetal line 51 is arranged between the two sides; the orthographicprojections of the two sides, which are close to each other, of the twoadjacent pixel opening region contours are both parallel to anorthographic projection of the first metal line 51 on the base substrate51, a distance between one of the orthographic projections of the twosides and the orthographic projection of the first metal line 51 on thebase substrate and a distance between the other of the orthographicprojections of the two sides and the orthographic projection of thefirst metal line 51 on the base substrate are identical; that is, thefirst metal line 51 between the two adjacent pixel opening regions islocated in the middle of the gap between the two pixel opening regioncontours, the minimum distance between the first metal line 51 and oneof the two pixel opening regions (the distance between the first metalline 51 and the side, which is closest to the first metal line, of oneof the two pixel opening regions) and the minimum distance between thefirst metal line 51 and the other of the two pixel opening regions arethe same. This arrangement can avoid that the distance between the firstmetal line and any of the two pixel opening regions is too small toadversely affect the light of the pixel opening regions; in addition,this arrangement makes the first metal line have the same influence onthe light of the two pixel opening regions, thereby improving theuniformity of the display.

For the convenience of description, a distance between orthographicprojections of two sides, which are parallel to and close to each other,of two adjacent pixel opening region contours on the base substrate 21is referred to as a gap between the two adjacent pixel opening regioncontours (PDL GAP).

For example, as shown in FIG. 1B, in the first direction D1, a gap t1between a second pixel opening region contour 125 and a third pixelopening region contour 135 that are adjacent, a gap t2 between a secondpixel opening region contour 125 and a first pixel opening regioncontour 115 that are adjacent, a gap t3 between orthographic projectionsof the first pixel opening region contour 115 and the third pixelopening region contour 135 that are adjacent on the base substrate areequal or approximately equal. For example, t1 is 23 micrometers, t2 is22.8 micrometers, and t3 is 23 micrometers.

For example, as shown in FIG. 1B, in an oblique direction that isneither parallel nor perpendicular to the second direction D2, a gap k2between the second pixel opening region contour 125 and the first pixelopening region contour 115 that are adjacent and a gap k3 between thethird pixel opening region contour 135 and the first pixel openingregion contour 115 that are adjacent are substantially equal, and arebasically equal to t1, t2, and t3. For example, a gap k1 between thesecond pixel opening region contour 125 and the third pixel openingregion contour 135 that are adjacent in the oblique direction that isneither parallel nor perpendicular to the second direction D2 is themaximum value (PDLGAPmax) of the gaps among the pixel opening regioncontours; that is, the gap k1 is greater than the gap between any othertwo adjacent pixel opening region contours (any one of t1, t2, t3, k2,and k3). For example, the gap t2 between the second pixel opening regioncontour 125 and the first pixel opening region contour 115 that areadjacent in the first direction D1 is the minimum value (PDLGAPmin) ofthe gaps among the pixel opening region contours; that is, the gap t2 issmaller than the gap between any other two adjacent pixel opening regioncontours (any one of t1, t3, k1, k2, and k3).

For example, an average line width of the first metal line 51, anaverage line width of the second metal line 61, and the gap between thetwo adjacent pixel opening region contours satisfy the followingrelationship:

(PDLGAPmax−PDLGAPmin)*0.5<X<PDLGAPmax*0.167,

where X is the average line width of the first metal line 51 or theaverage line width of the second metal line 61, and PDLGAPmax andPDLGAPmin are the maximum value and the minimum value of the gaps amongthe pixel opening region contours, respectively.

If the line width of the first metal line 51 or the second metal line 61is too large (for example, relative to the gap between the pixel openingregion contours (PDL GAP)), it is likely to be too close to the pixelopening region, which will block or reflect the light emitted by thepixel opening region, and is also easy to be recognized by human eyesand affect the display effect of the display panel. If the line width istoo small, it will easily lead to line breakage and increase theresistance of the touch electrode. By satisfying the above-mentionedrelationship, the line width of the first metal line 51 or the secondmetal line 61 can obtain an appropriate value, thereby alleviating theabove-mentioned problem.

For example, the average line width of the first metal line 51 isgreater than the average line width of the second metal line 61. Settingthe line width of the first metal line 51 and the line width of thesecond metal line 61 to be different can minimize the overlapping areabetween the first metal line and the second metal line, thereby reducingthe capacitive load on the touch electrode and improving the touchsensitivity. In addition, because the first touch sub-electrode and thesecond touch sub-electrode are both composed of the first metal line 51,setting the line width of the first metal line 51 to be larger can helpreduce the resistance of the touch sub-electrode, thereby furtherimproving the touch sensitivity.

For example, t1 is 23 micrometers, t2 is 22.8 micrometers, and t3 is 23micrometers; k1 is 27.35 micrometers, k2 is 22.86 micrometers, and k3 is23 micrometers.

For example, referring to FIG. 5D, the average line width X1 of thefirst metal line 51 is 3.5 micrometers, and the average line width X2 ofthe second metal line 61 is 3.3 micrometers.

For example, as shown in FIG. 1B, the size w1 of the first metal meshcorresponding to the first pixel opening region contour 115 in the firstdirection D1 is 43.1 micrometers, and the maximum size y1 of the firstmetal mesh corresponding to the first pixel opening region contour 115in the second direction D2 (for example, the distance between twovertices, which are opposite in the second direction D2, of the firstmetal mesh) is 73.6 micrometers; the size w2 of the first metal meshcorresponding to the second pixel opening region contour 125 in thefirst direction D1 is 31.9 micrometers, the maximum size y1 of the firstmetal mesh corresponding to the second pixel opening region contour 125in the second direction D2 (for example, the distance between twovertices, which are opposite in the second direction D2, of the firstmetal mesh) is 72.9 micrometers; the size w1 of the first metal meshcorresponding to the third pixel opening region contour 135 in the firstdirection D1 is 42.4 micrometers, the maximum size y1 of the first metalmesh corresponding to the third pixel opening region contour 135 in thesecond direction D2 (for example, the distance between two vertices,which are opposite in the second direction D2, of the first metal mesh)is 66.1 micrometers.

FIG. 1D shows the first pixel opening region contour 115, the secondpixel opening region contour 125, the third pixel opening region contour135, which are adjacent, and the first metal lines 51 locatedtherebetween. The first pixel opening region contour 115, the secondpixel opening region contour 125, the third pixel opening region contour135, which are adjacent, are arranged in a shape like a Chinesecharacter “A”; the second pixel opening region contour 125 is adjacentto the first pixel opening region contour 115 and the third pixelopening region contour 135 in a direction that is neither parallel norperpendicular to the second direction D2, and the first pixel openingregion contour 115 and the third pixel opening region contour 135 areadjacent in the first direction D1.

As shown in FIG. 1D, for example, the gap k1 between the second pixelopening region contour 125 and the third pixel opening region contour135 that are adjacent, the gap k2 between the second pixel openingregion contour 125 and the first pixel opening region contour 115 thatare adjacent, and the gap t3 between the orthographic projections of thethird pixel opening region contour 135 and the first pixel openingregion contour 115 that are adjacent on the base substrate 21 aredifferent from each other. Also, because the first metal line locatedbetween the two adjacent pixel opening region contours is located in themiddle of the gap between the two adjacent pixel opening regioncontours, this may result in that the three first metal lines 51 locatedbetween the three pixel opening region contours 115, 125, and 135 do notintersect at one point, as shown in FIG. 1D, every two of the threefirst metal lines 51 intersect, so as to define a triangle.

For example, as shown in FIG. 1D, the first metal mesh corresponding tothe second pixel opening region contour 125 includes a first side x1 anda second side x2 that are adjacent, and the first side x1 is neitherparallel nor orthogonal to the second direction D2, the second side x1is neither parallel nor orthogonal to the second direction D2. The firstside x1 is located between the second pixel opening region contour 125and the first pixel opening region contour 115, and the second side x2is located between the second pixel opening region contour 125 and thethird pixel opening region contour 135. For example, a length of thefirst side x1 and a length of the second side x2 are different; forexample, the first side x1 is longer than the second side x2. Thisasymmetry structure is also caused by the difference in the gaps amongthe pixel opening region contours. As shown in FIG. 1B, for example, thearea of the pixel opening region 110 of the green sub-pixel 11, the areaof the pixel opening region 120 of the red sub-pixel 12, and the area ofthe pixel opening region 130 of the blue sub-pixel 13 increasesequentially. For example, the area of the pixel opening region 110 ofthe green sub-pixel 11 is the smallest. This is because the lifetime ofthe light-emitting material of the green sub-pixel 11 is longer than thelifetime of other color sub-pixels. Therefore, setting the area of thepixel opening region 110 of the green sub-pixel 11 to a minimum valuecan improve light emission uniformity and stability of the displaypanel.

For example, as shown in FIG. 1B, the first metal mesh 52 covering thepixel opening regions of the two green sub-pixels is hexagonal, andother first metal meshes 52 directly connected to the first metal mesh52 covering the pixel opening regions of the two green sub-pixels arealso hexagonal. However, the embodiments of the present disclosure arenot limited to this case. The first metal mesh can also bequadrilateral, pentagonal, or have other shapes.

As shown in FIG. 1C, the display structure 30 further includes a firstencapsulation layer 33 located between the light-emitting element 23 andthe touch structure 40, and the encapsulation layer 33 is configured toseal the light-emitting element 23 to prevent external moisture andoxygen from penetrating into the light-emitting element and the drivingcircuit to cause damage to devices, such as the light-emitting element23. For example, the encapsulation layer 33 may have a single-layerstructure or a multi-layer structure, for example, a multi-layerstructure including an organic thin film, an inorganic thin film, or amulti-layer structure in which organic thin films and inorganic thinfilms are alternately stacked.

As shown in FIG. 1C, the touch display panel 20 further includes abuffer layer 22 located between the display structure 30 and the touchstructure 40. For example, the buffer layer 22 is formed on the firstencapsulation layer 33 to improve the adhesion between the touchstructure 40 and the display structure 30. For example, the buffer layer22 is an inorganic insulation layer. For example, the material of thebuffer layer 22 may be silicon nitride, silicon oxide, or nitrogenoxides of silicon. For example, the buffer layer 22 may also include astructure in which silicon oxide layers and silicon nitride layers arealternately stacked.

For example, the touch display panel 20 may further include a coverplate 34 located above the touch structure 40, and the cover plate 34is, for example, a glass cover plate or an organic flexible cover plate.

In other examples, a transparent protective layer (such as transparentoptical glue) may also be used instead of the cover plate 34 to protectthe touch structure 40.

For example, the base substrate 21 may be a glass substrate, a siliconsubstrate, or a flexible substrate, for example, may be formed of aplastic material having excellent heat resistance and durability, suchas polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET),polycarbonate, polyethylene, polyacrylate, polycarbonate, polyarylcompounds, polyetherimide, polyethersulfone, polyethylene terephthalate(PET), polyethylene (PE), polypropylene (PP), polysulfone (PSF),polymethyl methacrylate (PMMA), cellulose triacetate (TAC), cycloolefinpolymer (COP) and cycloolefin copolymer (COC), etc.

FIG. 2 shows another schematic diagram of a pixel arrangement providedby an embodiment of the present disclosure, unlike the pixel arrangementstructure shown in FIG. 1A, in the pixel arrangement structure as shownin FIG. 2, two blue sub-pixels 13 or two red sub-pixels 12 are providedbetween two green sub-pixel pairs that are adjacent in the firstdirection. For example, the two blue sub-pixels 13 are arranged alongthe second direction, and the two red sub-pixels 12 are arranged alongthe second direction.

Similarly, the pixel opening regions of the two green sub-pixels in thegreen sub-image pair may be exposed to the mesh hole 520 of the samefirst metal mesh 52, similar portions will not be repeated here.

For example, in the case where an organic light-emitting diode isprepared by a precision metal mask (FMM) evaporation process, oneevaporation hole can be used to form the light-emitting layers of thetwo adjacent red sub-pixels or the two adjacent blue sub-pixels, therebyreducing the difficulty of the manufacturing process.

In other examples, because the human eye has the lowest sensitivity tothe position of the blue sub-pixel 13 and the brightness effect of theblue sub-pixel is also the lowest, the two blue sub-pixels 13 adjacentlyarranged can be merged into one sub-pixel, that is, the two bluesub-pixels 13 share the same light-emitting element and the same pixeldriving circuit, thereby reducing the process difficulty and savingprocess cost. For example, the pixel opening regions of the two bluesub-pixels are also merged into one pixel opening region.

For example, the first metal mesh layer 50 includes a plurality of firsttouch sub-electrodes and a plurality of first connection electrodesarranged along the first direction D1, the plurality of first touchsub-electrodes and the plurality of first connection electrodes arealternately distributed one by one and electrically connected insequence to form first touch electrodes extending along the firstdirection; the first metal mesh layer 50 further includes a plurality ofsecond touch sub-electrodes arranged in sequence along the seconddirection D2 and spaced apart from each other; each of the plurality offirst touch sub-electrodes and each of the plurality of second touchsub-electrodes are spaced apart from each other, and each includes aplurality of first metal meshes 52 connected to each other.

For example, the touch structure further includes a second metal meshlayer. Relative to the base substrate 21, the second metal mesh layer islocated in a layer different from the first metal mesh layer, and thefirst metal mesh layer and the second metal mesh layer are separated byan insulation layer 70 (as shown in FIG. 1C). For example, the secondmetal mesh layer is closer to the base substrate.

Referring to FIG. 1C, because the second electrode 232 is a commonelectrode, and is used to load a constant power supply voltage; thesecond touch electrode 420 in the first metal mesh layer 50 needs totransmit the change amount of the touch sensing signal caused by thetouch, thereby achieving the touch detection function, therefore, thefirst metal mesh layer are arranged to further away from the basesubstrate, that is, away from the second electrode 232, this arrangementcan prevent the constant signal in the second electrode 232 fromaffecting the changed signal in the second touch electrode 420, therebypreventing from affecting the accuracy of touch detection.

The second metal mesh layer includes a plurality of second metal meshesdefined by a plurality of second metal lines, orthographic projectionsof the plurality of second metal lines on the base substrate are locatedoutside orthographic projections of the pixel opening regions of theplurality of sub-pixels on the base substrate, that is, are located inorthographic projections of the pixel spacing regions on the basesubstrate. The second metal mesh layer includes a plurality of secondconnection electrodes (that is, bridge electrodes) spaced apart fromeach other, and each of the plurality of second connection electrodeselectrically connects adjacent second touch sub-electrodes to form asecond touch electrode extending in the second direction. The secondconnection electrode includes a plurality of second metal meshesconnected to each other.

FIG. 3A shows a schematic diagram of a touch structure 40 provided by atleast one embodiment of the present disclosure. As shown in FIG. 3A, thetouch electrode structure includes a plurality of first touch electrodes410 (R1-Rn) extending in a first direction D1 and a plurality of secondtouch electrodes 420 (T1-Tn) extending in a second direction D2. Forexample, the first touch electrode 410 is a touch sensing electrode, andthe second touch electrode 420 is a touch driving electrode. However,the embodiments of the present disclosure are not limited to this case,in other examples, the first touch electrode 410 may be a touch drivingelectrode, and the second touch electrode 420 is a touch sensingelectrode.

Each first touch electrode 410 includes first touch sub-electrodes 411sequentially arranged along the first direction D1 and connected to eachother, and each second touch electrode 420 includes second touchsub-electrodes 421 sequentially arranged along the second direction D2and connected to each other. As shown in FIG. 3, the contour of the mainbody of each of the first touch sub-electrode 411 and the second touchsub-electrode 421 is a rhombus. In other examples, the first touchsub-electrode 411 and the second touch sub-electrode 421 may also haveother shapes, such as a triangle, a bar, and the like.

First touch sub-electrodes 411 that are adjacent in the first directionD1 are electrically connected through a first connection electrode (notshown) to form the first touch electrode 410, and second touchsub-electrodes 421 that are adjacent in the second direction D2 areelectrically connected through a second connection electrode (not shown)to form the second touch electrode 420.

Each first touch electrode 410 and each second touch electrode 420 areinsulated from each other and cross each other, and a plurality of touchunits 400 are formed at the intersections between the first touchelectrodes 410 and the second touch electrodes 420, each touch unitincludes a part of each of two first touch electrode parts connected atan intersection and at least a part of each of two second touchelectrode parts connected at the intersection. FIG. 3A shows an enlargedschematic diagram of a touch unit 400 on the right. As shown in FIG. 3A,each touch unit 400 includes half regions of respective two first touchsub-electrodes 411 adjacent to each other and half regions of respectivetwo second touch sub-electrodes 421 adjacent to each other, that is,includes a region of one first touch sub-electrode and a region of onesecond touch sub-electrode 421 on average, the intersection of the firsttouch sub-electrode 411 and the second touch sub-electrode 421 in eachtouch unit 400 (that is, the intersection of the first connectionelectrode and the second connection electrode) forms a reference pointfor calculating coordinates. In the case where the finger touches thecapacitive screen, the finger affects the coupling between the firsttouch electrode and the second touch electrode near the touch point,thereby changing the mutual capacitance between the two electrodes. Thetouch sensing signal changes according to the change amount of thecapacitance of the touch screen, so that the coordinates of each touchpoint can be calculated based on the reference point. For example, thearea of each touch unit 400 is equivalent to the contact area between ahuman finger and the touch panel. If the area of the touch unit is toolarge, it may cause a touch blind spot on the panel, and if the area ofthe touch unit is too small, it may cause false touch signals.

The average side length of each touch unit 400 is P, which is called apitch of the touch structure. For example, the size of the pitch Pranges from 3.7 mm to 5 mm, for example, about 4 mm; this is because thediameter of a region where a human finger contacts the touch panel isabout 4 mm. For example, the size of the pitch is the same as theaverage side length of each first touch sub-electrode 411 and theaverage side length of each second touch sub-electrode 421, and is alsothe same as the center distance between the adjacent first touchsub-electrodes 411 and the center distance between the adjacent secondtouch sub-electrodes 421.

For example, the first metal mesh layer 50 further includes dummyelectrodes. As shown in FIG. 3A, each of the first touch controlsub-electrode 411 and the second touch control sub-electrode 421includes a hollow region, the dummy electrodes 430 spaced from the touchsub-electrode are provided in the hollow region of the touch sub-pixel.By providing the hollow region, the electrode area (the effective area)of the touch electrode is reduced, and the capacitive load (theself-capacitance) on the touch electrode is reduced, thereby reducingthe load on the touch electrode and improving the touch sensitivity. Forexample, the dummy electrode 430 is in a floating state, that is, is notelectrically connected to other structures or does not receive anyelectrical signals. For example, each of the dummy electrodes 430includes a plurality of first metal meshes 52 connected to each other.

For example, the touch region is usually a rectangle (referring to FIG.10), one of the touch driving electrode and the touch sensing electrodeextends along a length direction of the rectangle, and the other of thetouch driving electrode and the touch sensing electrode extends along awidth direction of the rectangle; the touch electrode extending alongthe length direction is longer, so the load is larger. In order toimprove the touch sensitivity of the touch electrode structure, it isnecessary to reduce the load on the touch electrode.

For example, the length of the second touch electrode 420 is greaterthan the length of the first touch electrode 410, and the total area ofthe hollow region in the second touch electrode 420 is greater than thetotal area of the hollow region in the first touch electrode 410 (asshown in FIG. 3A), so that the self-capacitance (parasitic capacitance)on the longer second touch electrode can be effectively and targetedlyreduced, and the touch sensitivity of the touch electrode structure canbe improved. In addition, by arranging the dummy electrode in the samelayer as the touch electrode in the hollow region, the uniformity of thefilm layer can be improved and the product yield can be increased. Insome embodiments, the hollow region and the dummy electrode may beprovided only in the longer second touch electrode, however, this designis not made for the first touch electrode (as shown in FIG. 3B).

For example, each dummy electrode 430 has the same contour as the hollowregion where it is located, that is, the dummy electrode and the touchsub-electrode where the dummy electrode is located are nested with eachother; there is a boundary region between the dummy electrode and thetouch sub-electrode, and the dummy electrode and the touch sub-electrodeare insulated from each other through the boundary region. For example,the dummy electrode 430 and the touch sub-electrode (the first touchsub-electrode or the second touch sub-electrode) that is adjacent to thedummy electrode 430 are insulated from each other by a space formed bythe disconnection of the first metal line, that is, the first metal linein the boundary region forms two first metal line segments separated bya space, one of the two first metal line segments belongs to the dummyelectrode 430, and the other of the two first metal line segmentsbelongs to the touch sub-electrode.

The average size of the boundary region (the average distance betweenthe dummy electrode and the touch electrode) is the minimum size thatmeets the design rule, for example, ranges from 3 micrometers to 6micrometers. In this way, the uniformity of the film layer where theelectrode is located can be improved, and the process yield can beimproved. For example, sizes of the first boundary regions (gaps)between respective dummy electrodes 430 and the touch sub-electrodesnested therewith are the same.

For example, as shown in FIG. 3A, the boundary region extends along acurve, that is, the contour of the dummy electrode is a curve structure.For example, the contour includes a sawtooth structure. This designenables the region involved in the dummy electrode larger in the samearea. Because the dummy electrode and the touch sub-electrode are nestedwith each other, the region involved in the touch electrode is alsorelatively large, which can avoid the blind spots caused by the reasonthat the dummy electrodes are too concentrated; in addition, because thetouch electrode and the dummy electrode are nested with each other, thatis, the inner contour of the touch electrode is also a curved structure,compared with a linear structure, this structure can increase theperimeter of the inner contour, thereby increasing the mutualcapacitance of the touch electrode.

FIG. 3B shows a schematic diagram of a touch structure provided by otherembodiments of the present disclosure, as shown in FIG. 3B, each of thefirst touch sub-electrode 411 and the second touch sub-electrode 421includes a main body and a plurality of interdigital structures 440extending from the main body, and the first touch sub-electrode 411 andthe second touch sub-electrode 421 that is adjacent to the first touchsub-electrode 411 are nested in the first metal mesh 50 through theinterdigital structures 440 to form a mutual capacitor. The interdigitalstructure can increase the perimeter of the touch sub-electrode underthe same area, and therefore, the interdigital structure can effectivelyincrease the mutual capacitance without increasing the self-capacitance(capacitive load) of the touch sub-electrode, thereby improving thetouch sensitivity. For example, the shape of the main body may be acircle or a rectangle, and the shape of the interdigital structureincludes at least one of the following shapes: a parallelogram (forexample, a rectangle), a triangle, a trapezoid, and a hexagon.

For example, the plurality of interdigital structures 440 aredistributed around the main body of the touch sub-electrode. Forexample, the main body is rectangular, and the number of the secondinterdigital structures 112 corresponding to each side of the main bodyis 3-10, such as 6-10. In other examples, the main body may also becircular, and the interdigitated structures 440 are evenly distributedon the circumference of the circular main body.

FIG. 3B shows an enlarged schematic diagram of a touch unit 400 on theright. As shown in FIG. 3B, the first touch sub-electrodes 411 that areadjacent in the first direction D1 are connected by the first connectionelectrode 412 to form the first touch electrode 410 extending along thefirst direction D1, and the second touch sub-electrodes 421 that areadjacent in the second direction D2 are connected by the secondconnection electrode (not shown in FIG. 3B) to form the second touchelectrode 420 extending in the second direction D2.

For example, the length of each interdigital structure 440 is 1/10-⅓ ofthe center distance between adjacent first touch sub-electrodes 411,that is, the distance between the center points of the adjacent firsttouch sub-electrodes 411. For example, the center distance is the pitchP of the touch structure. For irregular interdigital structures, forexample, the length may be the average length, the maximum length, orthe minimum length of the interdigital structures 440.

For example, the width of each interdigital structure 440 is 1/10-¼ ofthe center distance between the adjacent first touch sub-electrodes 411,for example, is 1/10-¼ of the pitch P of the touch structure. Forirregular interdigital structures, for example, the width may be theaverage width, the maximum width, or the minimum width of theinterdigital structures 440.

For example, the gap d between adjacent interdigital structures 440 is1/20- 1/10 of the pitch P of the touch structure. In the case where thegaps between adjacent interdigital structures are not uniform, forexample, the gap d may be the average gap, the maximum gap, or theminimum gap of the interdigital structures 440.

FIG. 4A shows an enlarged schematic diagram of a touch sub-electrode ina touch structure provided by some embodiments of the presentdisclosure, the touch sub-electrode may be the first touch sub-electrode411 or the second touch sub-electrode 421. The first touch sub-electrode411 is taken as an example for description below.

As shown in FIG. 4A, the first touch sub-electrode 411 includes a mainbody 413 and a plurality of interdigital structures 440 connected to themain body 413, the interdigital structures 440 are distributed aroundthe main body 413. The main body 413 includes a plurality of sides, forexample, the shape of the main body 413 is a rectangle; for example, thenumber of the interdigital structures 440 corresponding to each side is3-10, such as 6-10.

For example, as shown in FIG. 4A, the dummy electrode 430 in the firsttouch sub-electrode 411 includes interdigital structures 460. Theextension direction of the at least one interdigital structure 460 andthe extension direction of the at least one interdigital structure 440of the first touch sub-electrode 411 are parallel to each other.

For example, the interdigital structure 440 or the interdigitalstructure 460 may have a regular shape or an irregular shape, forexample, may include at least one of the following shapes: a rectangle,a triangle, and a trapezoid. As shown in FIG. 4A, each interdigitalstructure 460 has a convex shape, that is, a combination of tworectangles; this structure further increases the side length of thefirst touch electrode portion 411 compared to the shape of a singlerectangle.

FIG. 4B shows a schematic diagram of a touch unit in a touch structureprovided by some embodiments of the present disclosure. As shown in FIG.4B, along the first direction D1, the adjacent first touchsub-electrodes 411 are electrically connected to each other through thefirst connection electrode 412 to form the first touch electrode 410located in the first metal mesh layer 50; along the second direction D2,the adjacent second touch sub-electrodes 421 are electrically connectedto each other through the second connection electrode 422 located in thesecond metal mesh layer 60 to form the second touch electrode 420. Thefirst touch sub-electrode 411 and the second touch sub-electrode 421 arenested and isolated from each other in the first metal mesh layer 50through the interdigital structures 440. As shown in FIG. 4B, theboundary line between the first touch sub-electrode 411 and the secondtouch sub-electrode 421 is zigzag due to the existence of theinterdigital structures.

FIG. 5A shows an enlarged schematic diagram of a region A in FIG. 3B andFIG. 4B, the region A is the intersection of the first touchsub-electrode 411 and the second touch sub-electrode 421, that is, thebridge region; FIG. 5B is a cross-sectional view of FIG. 5A along thesection line B-B′, FIG. 5D is a cross-sectional view of FIG. 5A alongthe section line D-D′, and the specific details of the display structureare omitted in FIGS. 5B and 5D.

The light mesh in FIG. 5A illustrates the first metal mesh in the firstmetal mesh layer 50, the first metal mesh layer 50 includes the firsttouch electrode 410 (including the first touch sub-electrode 411 and thefirst connection electrode 412) and the second touch sub-electrode 421,the first touch sub-electrode 411, the first connection electrode 412,and the second touch sub-electrode 421 each includes a plurality offirst metal meshes 52 connected to each other; the dark mesh in FIG. 5Aillustrates the second metal mesh in the second metal mesh layer 60, thesecond metal mesh layer 60 includes the second connection electrode 422,and the second connection electrode 422 includes a plurality of secondmetal meshes 62 connected to each other.

For example, the two ends of the second connection electrode 422 arerespectively electrically connected to two second touch sub-electrodes421 that are adjacent in the second direction D2 through the holes 71 inthe insulation layer 70, so as to electrically connect the two secondtouch sub-electrodes 421 that are adjacent in the second direction D2.The connection region C of the two second touch sub-electrodes 421 isshown in FIG. 5A.

For example, as shown in FIG. 5A, second touch sub-electrodes 421 thatare adjacent in the second direction D2 are electrically connected bytwo second connection electrodes 422. The arrangement of thisdual-channel structure can effectively improve the yield of the device.For example, the position where the signal lines cross is likely tocause a short circuit due to electrostatic breakdown of the mutualcapacitor, in the detection process, in the case where it is detectedthat one channel of the two second connection electrodes 422 has a shortcircuit failure, even if the channel is cut (for example, by lasercutting), the circuit structure can still work normally through theother channel.

For example, the orthographic projections of the plurality of firstmetal lines 51 in the at least two first metal meshes 52 in the secondtouch sub-electrode 421 on the second metal mesh layer 60 respectivelyoverlaps the plurality of second metal lines 61 in the at least twosecond metal meshes 62 in each of the plurality of second connectionelectrodes 422, so that the at least two first metal meshes 52 have aplurality of vertices overlapping with the at least two second metalmeshes 62, and the plurality of vertices include a plurality ofconnection vertices, the plurality of holes 71 are located at theplurality of connection vertices, respectively, that is, the pluralityof holes 71 are arranged in a one-to-one correspondence manner with theplurality of connection vertices, and a vertex provided with a hole inthe first metal mesh 52 is called a connection vertex.

It should be noted that the first metal line/second metal line in thepresent disclosure refers to the metal line connected between twoadjacent vertices of the first metal mesh/second metal mesh, that is,each first metal line/second metal line corresponds to one side of thefirst metal mesh/second metal mesh.

For example, the at least two second metal meshes 62 are edge metalmeshes located at the ends of the second connection electrode 422; theat least two first metal meshes 52 are edge metal meshes located at theends of the second touch electrode 421. The first metal mesh 52 and thesecond metal mesh 62 are both polygonal.

As shown in FIG. 5A, the second connection electrode 422 is electricallyconnected to the first metal line 51 a in the edge first metal mesh 52a, which is adjacent to the second connection electrode 422, through thesecond metal line 61 a in the edge second metal mesh 62 a located ateach end, so that the second connection electrode 422 is electricallyconnected to the second touch sub-electrode 421.

For example, the second metal line 61 a is located at the side, which isclosest to the second touch sub-electrode 421, of the edge second metalmesh 62 a. For example, the first metal line 51 a is located at theside, which is closest to the second connection electrode 422, of theedge first metal mesh 52 a. This arrangement can minimize theoverlapping between the second touch sub-electrode 421 and the secondconnection electrode 422, thereby reducing the capacitive load on thetouch sub-electrode and improving touch sensitivity.

For example, as shown in FIG. 5A and FIG. 5B, at least two second metallines 61 a of the polygonal edge second metal mesh 62 a, which islocated at each end, of the second connection electrode 422 and the atleast two first metal lines 51 a of the polygonal edge first metal mesh52 a of the adjacent second touch sub-electrode 421 overlap in adirection perpendicular to the base substrate, respectively, and areelectrically connected through holes 71 in the insulation layer, so thatthe second connection electrode 422 is electrically connected to thesecond touch sub-electrode 421. For example, as shown in FIGS. 5A and5B, the at least two first metal lines 51 a and the at least two secondmetal lines 61 a overlap each other in a direction perpendicular to thebase substrate 21, so that the edge first metal mesh 52 a has aplurality of vertices 53 overlapping with the edge second metal mesh 62a, the plurality of vertices 53 include a plurality of connectionvertices 53 a, and the hole 71 is respectively located at a connectionvertex 53 a, that is, the vertex 53 provided with the hole 71 is theconnection vertex 53 a. For example, the plurality of vertices 53 of theedge first metal mesh 52 a and the plurality of vertices 63 of the edgesecond metal mesh 62 a overlap each other in a direction perpendicularto the base substrate 21, and each hole 71 corresponds to a pair ofvertices 53/vertices 63 overlapping each other, respectively.

It should be noted that in FIG. 5A, the first metal mesh layer 50 iscloser to the viewer, so that the second metal line 61 a, which overlapsthe edge first metal mesh 52 a, of the edge second metal mesh 62 a isblocked by the first metal line 51 a in the edge first metal mesh 52 a,however, for the convenience of description, the second metal line 61 aand the metal contact pad 65 are specifically shown in FIG. 5A.

For example, in the first metal mesh, among the vertices 53 adjacent toeach connection vertex 53 a, at most one vertex 53 (the two adjacentvertices are located at both ends of a first metal line 51) is theconnection vertex 53 a, that is, in the first metal mesh layer, thereare no three consecutive vertices being connection vertices.

It should be noted that the vertex adjacent to each connection vertexrefers to the vertex directly adjacent to the connection vertex througha metal line. As shown in FIG. 5A, in the case where the first metalmesh and the second metal mesh are hexagonal, the number of verticesadjacent to each connection vertex is at most three.

For example, as shown in FIGS. 5A and 5B, for each second connectionelectrode 422, four first metal lines 51 a in the three polygonal edgefirst metal mesh 52 a and the four second metal lines 61 a in the twopolygonal edge second metal mesh 62 a overlap each other in a directionperpendicular to the base substrate, so that the edge first metal mesh52 a has five vertices 53 overlapping with the edge second metal mesh 62a, the four first metal lines 51 a connect the five vertices 53 insequence (for example, along the first direction) to form a W-shape; thefive vertices 53 are sequentially denoted as No. 1 vertex, No. 2 vertex,No. 3 vertex, No. 4 vertex, and No. 5 vertex. For example, the No. 1vertex, the No. 2 vertex, the No. 4 vertex, and the No. 5 vertex areprovided with a hole 71, and are the connection vertices 53 a, and theconnection vertices 53 a are indicated by circle dots in FIG. 5A. Thefour connection vertices 53 a respectively generate four effectivechannels 54 for transmitting the touch signals (touch driving signals ortouch sensing signals) on the second touch sub-electrode 421 to thesecond connection electrode 422. For example, the plurality ofconnection vertices 53 a are not located on a straight line. As shown inFIG. 5A, the plurality of connection vertices 53 a are located on twostraight lines.

For example, the effective channel can be understood as the first metalline 51, which is directly connected to the connection vertex 53 a andis necessary to transmit the touch signal in the second touchsub-electrode 421 to the second connection electrode 422 by the hole 71corresponding to the connection vertex 53 a. Therefore, the first metalline 51 connected between two adjacent connection vertices 53 a is notan effective channel, because the touch signal can be transmitted to thesecond connection electrode 422 through the hole 71 corresponding to anyconnection vertex 53 a in the case where the touch signal reaches theany connection vertex 53 a, without passing through the first metal line51.

Through the above setting, each connection vertex 53 a can generate aneffective channel, thereby minimizing the overlap between the firstmetal line 51 a and the second metal line 52 a.

For example, the left side of FIG. 5C shows an example of a second metalmesh 62 that is not provided with a vertex 63 with a hole, and the rightside of FIG. 5C shows an example of a second metal mesh 62 that iscorrespondingly provided with a vertex 63 a (corresponding to connectionvertex 53 a) with a hole 71. As shown in FIG. 5C, in order to make thefirst metal line 51 make good contact with the second metal line 61through the hole 71 at the connection vertex 53 a, the second metal meshlayer 60 will form a metal contact pad 65 having a relatively large areaat the vertex 63 a, resulting in an area occupied by the vertex 63 abeing larger than an area occupied by the original vertex 63. Similarly,the first metal mesh layer 50 will also form a metal contact pad havinga relatively large area at the connection vertex 53 a. For example, theshape of the metal contact pad is rectangular or circular, and the size(average side length or diameter) of the metal contact pad is more thantwice that of the first metal line 51 or the second metal line 61.Therefore, the arrangement of the hole 71 will cause the overlap areabetween the first metal line 51 and the second metal line 52 to becomelarger.

Through the above setting, each connection vertex 53 a can generate aneffective channel, thereby minimizing the arrangement of the metalcontact pad and reducing the area of the metal layer. On one hand, theself-capacitance of the second connection electrode 422 can be reduced,and on the other hand, the overlap between the first metal line 51 andthe second metal line 52 can be reduced. At least from these twoaspects, the capacitance load of the touch sub-electrode can be reducedand the touch sensitivity is improved.

In other examples, for example, the vertex 53 adjacent to eachconnection vertex 53 a in the edge first metal mesh 52 a is not aconnection vertex. For example, for each second connection electrode 422shown in FIG. 5A, the above-mentioned No. 1 vertex, No. 3 vertex, andNo. 5 vertex can be set as the connection vertices, and the threeconnection vertices form three effective channels. For example, theplurality of connection vertices are located on a straight line.

For example, for each second connection electrode 422, the number ofvertices at which the edge second metal mesh 62 a and the edge firstmetal mesh 52 a, which overlap with each other, is not less than 5, andthe number of the connection vertices is not less than 3.

For example, the first metal line 51 directly connected to eachconnection vertex 53 a is complete, that is, the first metal line 51 isconnected between the two vertices of the first metal mesh 52 without aspace in the middle of the first metal line 51. For example, the firstmetal mesh 52 where each connection vertex 53 a is located is complete,that is, all the first metal lines 51 in the first metal mesh 52 arecomplete. This configuration can improve the transmission efficiency andeffectiveness of the touch signal input from the second touchsub-electrode 421 to the second connection electrode 422.

For example, each second connection electrode 422 includes at least twoconnection lines (first connection lines), and a connection line 64 isexemplarily shown in FIG. 5A. The connection line 64 includes aplurality of second metal lines 61 that are connected end to end, eachof two ends of the connection line 64 corresponds to a vertex 63 a of asecond metal mesh 62, and is electrically connected to the connectionvertex 53 a of the first metal mesh 52 through a hole 71, so as toeffectively transmit signals between two adjacent second touchsub-electrodes 421. For example, the plurality of connection lines 64 donot have the second metal lines 61 overlapping (share) each other.

For example, as shown in FIG. 5A, each second connection electrode 422further includes a plurality of middle second metal meshes 62 b, and theplurality of middle second metal meshes 62 b are located between theedge second metal meshes 62 a at both ends of the second connectionelectrode 422, and connect the edge second metal meshes 62 a at bothends of the second connection electrode 422. The plurality of middlesecond metal meshes 62 b are sequentially connected, and each middlesecond metal mesh 62 a only includes two second metal lines 61 sharedwith the second metal meshes 62 that are adjacent to the middle secondmetal mesh 62 a, the two second metal lines 61 are not adjacent to eachother, and are respectively shared by the middle second metal mesh 62 aand the two second metal meshes 62 that are adjacent to the middlesecond metal mesh 62 a. Each middle second metal mesh 62 b includes twosecond metal lines 61 parallel to the second direction D2, and each ofthe two second metal lines 51 is located at the edge of the secondconnection electrode 244, that is, belongs exclusively to the middlesecond metal mesh 62 b and is not shared by two second metal meshes. Inthis case, as shown in FIG. 5A, each second connection electrode 422includes two connection lines 64.

For example, as shown in FIG. 5A, the orthographic projection of eachfirst connection electrode 412 on the second metal mesh layer 60 islocated in the gap between the two second connection electrodes 422,which are between the adjacent second touch sub-electrodes 421, that is,the first metal line 51 in the first connection electrode 412 and thesecond metal line 61 in the second metal mesh layer 60 do not overlap ina direction perpendicular to the base substrate. The range of the firstconnection electrode 412 is shown by a dotted line in FIG. 5A, as shownin FIG. 5A, the first connection electrode 412 is insulated from thesecond touch sub-electrode 421 that is adjacent to the first connectionelectrode 412 by a space, the space is located at the end of the firstmetal line 51 in the first connection electrode 412. For example, thefirst connection electrode 412 also forms a space at the end of thefirst metal line 51 to avoid overlapping with the second connectionelectrode 422 in a direction perpendicular to the base substrate,thereby reducing the capacitive load on the touch electrode.

For example, as shown in FIG. 5A, the second metal meshes 62 in thesecond connection electrode 422 are all complete meshes, and none of thesecond metal lines 61 in the second metal meshes 62 has a space. This isbecause the number of metal meshes in the second connection electrode422 is small, which can improve the yield of the second connectionelectrode 422 and ensure effective transmission of the signals.

For example, as shown in FIG. 5A, none of the first metal lines 51located at the first connection electrode 412 has a space, and the edgefirst metal meshes 52 located at the edge of the first connectionelectrode 412 are all defective, for example, are all lack at least oneside, so that the second metal line 61 does not overlap the first metalline 51.

For example, as shown in FIG. 5A, each first touch sub-electrode 411 iselectrically connected to a first connection electrode 412 adjacentthereto through at least one connection line 51 b (second connectionline) including a plurality of first metal lines 51 connected end to endin sequence; in a case where there are a plurality of connection lines51 b, the plurality of connection lines 51 b are spaced apart from eachother. The connection lines 51 b shown in FIG. 5A include three firstmetal lines 51. For example, each of the first metal lines 51 in theconnection line 51 b overlaps the second metal line 61 in the secondconnection electrode 422 in a direction perpendicular to the basesubstrate, so as not to affect the pixel aperture ratio.

FIG. 5E shows another example of an enlarged schematic diagram of aregion A in FIG. 3B and FIG. 4B. The light mesh in FIG. 5E illustratesthe first touch electrode 410 and the second touch sub-electrode 421 ofthe second touch electrode 420; the first touch electrode 410 comprisesthe first touch sub-pixel electrode 411 and the first connectionelectrode 412, the first touch control sub-electrode 411, the firstconnection electrode 412, and the second touch control sub-electrode 421each includes a plurality of first metal meshes 52 connected to eachother; that is, the light mesh is the first metal mesh 52 located in thefirst metal mesh layer 50; the dark mesh in FIG. 5E illustrates thesecond connection electrode 422 in the second touch electrode 420, thesecond connection electrode 422 includes a plurality of second metalmeshes 62 connected to each other. Therefore, the dark mesh is thesecond metal mesh 62 located in the second metal mesh layer 60. In thefigure, the range of the first connection electrode 412 is indicated bya dashed circle.

Unlike the embodiment shown in FIG. 5A, the second connection electrode422 in the embodiment shown in FIG. 5E includes a larger number ofmiddle second metal meshes 62 b, and the number of connection lines 51 bthat electrically connect each first touch sub-electrode 411 and thefirst connection electrode 412 adjacent thereto is larger (threeconnection lines are shown in the figure). As shown in FIG. 5E, theplurality of connection lines 51 b are spaced apart from each other, andthe first metal lines 51 between the two adjacent connection lines 51 bare not directly connected by a first metal line 51.

It should be noted that, in FIG. 5E, the first metal mesh layer 50 iscloser to the viewer, so that the second metal line 61 a, which overlapsthe edge first metal mesh 52 a, of the edge second metal mesh 62 a isblocked by the first metal line 51 a in the edge first metal mesh 52 a;however, for the convenience of description, the second metal line 61 aand the metal contact pad 65 are specifically shown in FIG. 5E.

For example, as shown in FIG. 5A, among the edge first metal lines ofthe first connection electrode 412, except for the first metal line thatis electrically connected to the connection line 51 b, the rest firstmetal lines all have spaces (notches) formed at the ends of the restfirst metal lines away from the first connection electrode 412. As shownin FIG. 5E, the first connection electrode 412 also includes an edgefirst metal line with a middle space, and the space separates the firstmetal line 51 into two first metal line segments, and the two firstmetal line segments respectively belong to the first connectionelectrode 412 and the second touch sub-electrode 421 adjacent to thefirst connection electrode 412, thereby achieving that the firstconnection electrode 412 and the second touch sub-electrode 421 areinsulated. As shown in FIGS. 5A and 5D, for example, there is no sharedfirst metal line 51 between the first metal mesh 52 in the first touchsub-electrode 411 and the first metal mesh 52 in the first connectionelectrode 412, that is, the first metal mesh 52 in the first touchsub-electrode 411 and the first metal mesh 52 in the first connectionelectrode 412 do not form an electrical connection by sharing the firstmetal line 51.

This arrangement can minimize the overlap between the metal line in thefirst touch sub-electrode 411 and the metal line in the secondconnection electrode 422, thereby reducing the mutual capacitancebetween the first touch sub-electrode 411 and the second connectionelectrode 422. In the case where the mutual capacitance value betweenthe first touch electrode 410 and the second touch electrode 420 changesdue to the touch signal, because the reference mutual capacitance valueis small, the change amount of the mutual capacitance value is easier tobe detected, thereby improving the sensitivity of the touch detection.

FIGS. 6A and 6B respectively show two examples of the enlarged schematicdiagram of the region B in FIG. 3B, the region B involves two firsttouch sub-electrodes 411 that are adjacent and insulated in the seconddirection D2 and two second touch sub-electrodes 421 that are adjacentand insulated in the first direction D1. The region B is an isolationregion of the four touch sub-electrodes.

For example, as shown in FIG. 5D, the average line width X1 of the firstmetal line 51 is greater than the average line width X2 of the secondmetal line 61. For example, in the width direction of the metal line,the orthographic projection of the second metal line 61 on the basesubstrate 21 is located within the orthographic projection of the firstmetal line 51 on the base substrate 21, which can effectively increasethe aperture ratio of the display substrate.

The metal meshes shown in FIG. 6A are all located in the first metalmesh layer, that is, are all first metal meshes, the light meshrepresents the first metal mesh in the adjacent first touchsub-electrodes 411, and the dark mesh represents the first metal mesh inthe two adjacent second touch sub-electrodes 421.

As shown in FIG. 6A, the first touch sub-electrode 411 and the secondtouch sub-electrode 421 are adjacent to each other, and each of theplurality of first metal lines 51 located in the boundary region betweenthe first touch sub-electrode 411 and the second touch sub-electrode 421includes a plurality of spaces (fracture) 510, each space 510 islocated, for example, in the middle of the first metal line 51 where thespace 510 is located, and separates the first metal line 51 where thespace 510 is located into two first metal line segments 51 f, and one ofthe two first metal line segments 51 f belongs to the first touchsub-electrode 411, and the other of the two first metal line segments 51f belongs to the second touch sub-electrode 421, so that the first touchsub-electrode 411 and the second touch sub-electrode 421 that areadjacent are insulated.

It should be noted that the first metal line segment belonging to thetouch sub-electrode in the embodiment of the present disclosure meansthat there is an electrical connection relationship between the firstmetal line segment and the touch sub-electrode.

In the touch structure provided by at least one embodiment of thepresent disclosure, the touch sub-electrodes that are adjacent andinsulated (for example, the first touch sub-electrode and the secondtouch sub-electrode that are adjacent, two second touch sub-electrodesthat are adjacent to each other in the first direction, and two firsttouch sub-electrodes that are adjacent to each other in the seconddirection) are insulated by a space formed by the disconnection of themetal line; compared with insulating by arranging dummy electrodes, thisarrangement can maximize the arrangement area of the touch electrodes,increase the density of the touch electrodes, and thus improve the touchsensitivity.

For example, as shown in FIG. 6A, the edge metal meshes of each touchsub-electrode are incomplete, that is, all include a part of the firstmetal mesh, and the edge metal meshes in adjacent touch sub-electrodesmatch each other to define the first metal mesh.

For example, the at least one first metal mesh includes three firstmetal mesh parts insulated from each other, and the three first metalmesh parts belong to one first touch sub-electrode and two second touchsub-electrodes adjacent to each other in the first direction D1. Forexample, the shape of the first metal mesh is a hexagonal shape, and theat least two first metal meshes include the above-mentioned three firstmetal mesh parts that are insulated from each other.

As shown in FIGS. 6A and 6B, in FIGS. 6A and 6B, each of the two firstmetal meshes 52 c in the dashed circle includes three first metal meshparts that are insulated from each other, the three first metal meshparts belong to three touch sub-electrodes that are insulated from eachother, and the three touch sub-electrodes include two first touchsub-electrodes 411 adjacent to each other in the second direction D2 andone second touch sub-electrode 421 located between the two first touchsub-electrodes (as shown in FIG. 6A), or the three touch sub-electrodesinclude two second touch sub-electrodes 421 adjacent to each other inthe first direction D1 and one first touch sub-electrode 411 locatedbetween the two second touch sub-electrodes 421 (as shown in FIG. 6B).This design enables the touch sub-electrodes effectively insulated whilebeing more compactly arranged, thereby improving the touch sensitivity.

For example, as shown in FIGS. 6A and 6B, there is a space 510 on eachof the three sides of each metal mesh 52 c, so that the metal mesh isdivided into three parts.

For example, as shown in FIGS. 6A and 6B, a shape of the first metalmesh 52 c is a polygon, such as a hexagon. The hexagon includes twosides parallel to the second direction D2 and opposite to each other.The first metal line 51 of the first metal mesh 52 c located on at leastone side has a space, which divides the first metal line into two firstmetal line segments 51 f. For example, as shown in FIG. 6A, the twofirst metal line segments 51 f respectively belong to two first touchsub-electrodes 411 adjacent in the second direction. For example, asshown in FIG. 6B, the two first metal line segments 51 f belong to thefirst touch sub-electrodes 411 and that second touch sub-electrodes 421that are adjacent, respectively.

For example, as shown in FIGS. 6A and 6B, the polygons of the two firstmetal meshes 52 c share one side, that is, the two first metal meshes 52c share a first metal line 51 g, there is a space 520 on the first metalline 51 g, and the space 520 separates the first metal line 51 g intotwo first metal line segments that are spaced apart to each other.

For example, as shown in FIG. 6A, the two first metal meshes 52 c arearranged along the first direction D1, and the shared first metal line51 g is parallel to the second direction D2. The two first metal linesegments in the shared first metal line 51 g respectively belong to thetwo first touch sub-electrodes 411 adjacent in the second direction D2;that is, the two first touch sub-electrodes 411 adjacent in the seconddirection D2 are directly adjacent to each other through the space orspaced apart from each other through the space. For example, the twosecond touch sub-electrodes 421 adjacent in the first direction D1 areseparated from each other by a part of the two first touchsub-electrodes 411 adjacent in the second direction D2.

For example, as shown in FIG. 6B, the arrangement direction of the twofirst metal meshes 52 c is neither parallel nor perpendicular to thesecond direction D2, and the shared first metal line 51 g is neitherparallel nor perpendicular to the second direction D2. The two firstmetal line segments in the shared first metal line 51 g respectivelybelong to two second touch sub-electrodes 421 adjacent in the firstdirection D1; that is, the two second touch sub-electrodes 421 adjacentin the first direction D1 are directly adjacent to each other throughthe space or spaced apart from each other through the space. Forexample, the two first touch sub-electrodes 411 adjacent in the seconddirection D2 are separated from each other by a part of the two secondtouch sub-electrodes 421 adjacent in the first direction D1.

For example, as shown in FIGS. 6A and 6B, each of the three first metalmesh parts of one first metal mesh 52 c of the two first metal meshes 52c includes a complete first metal line 51; the numbers of the firstmetal lines included in the three first metal mesh parts of the otherfirst metal mesh 52 c are different from each other, for example, thenumbers are 0, 1, and 2, respectively.

As shown in FIGS. 6A and 6B, each first metal mesh part includes twofirst metal line segments 51 f, or only includes two first metal linesegments 51 f; or each first metal mesh part includes a complete firstmetal line 51 and two first metal line segments 51 f, and the firstmetal line 51 is connected between the two first metal line segments; oreach first metal mesh part includes two complete first metal lines 51and two first metal line segments 51 f, and the two first metal lines 51are connected between the two first metal line segments 51 f.

The inventor found that in the boundary between the first touch controlsub-electrode and the second touch control sub-electrode, because thefirst touch control sub-electrode and the second touch controlsub-electrode are insulated by a disconnection line, there are spaces ofmetal lines with a higher density per unit area. In the case where thesespaces have a certain regular continuity, as a result, there is asignificant difference in the reflection of ambient light between thespace and the metal line, thereby resulting in that a severely visiblegap shadow is formed on the finally formed product, which greatlyaffects the user experience. For example, in the case where the touchstructure is applied to a display device, the shadow will reduce thedisplay quality.

At least one embodiment of the present disclosure further provides atouch structure, a plurality of spaces on a first metal line in aboundary region between a first touch sub-electrode and a second touchsub-electrode of the touch structure include a plurality of first spaceson a first line, the plurality of first spaces are respectively locatedon a plurality of first metal lines intersecting the first line, and thefirst line extends substantially in a certain direction; there is atleast one first metal line between at least two first spaces, the atleast one first metal line intersects the first line, and there is nospace at the intersection between the at least one first metal line andthe first line.

Through this setting, the continuity of the spaces in the boundaryregion can be effectively broken, and the purpose of shadow eliminationcan be achieved.

It should be noted that the first line may be a straight line or a curveextending substantially in a certain direction, for example, a polygonalline. Due to process fluctuations, the plurality of first spaces are notnecessarily located strictly on a straight line, but fluctuate up anddown relative to the straight line. As long as the curve extendssubstantially along a certain fixed direction, this embodiment alsofalls within the protection scope of the present disclosure.

In some examples, the first line is a first straight line. For example,the plurality of first spaces are respectively located on a plurality offirst metal lines orthogonal to the first straight line.

The following takes the case that the first line is the first straightline as an example to exemplarily illustrate the touch structureprovided by at least one embodiment of the present disclosure, but thisis not a limitation of the present disclosure.

FIG. 7A is a shadow schematic diagram of a metal line space design. Asshown in the figure, the plurality of spaces 510′ on the plurality ofmetal lines 51′ are continuously located on a straight line withoutdiscontinuity. For example, there is no metal line among the pluralityof spaces 510′, and there is no space at the intersection between themetal line and the straight line. The arrangement of the metal linesproduces a visually obvious shadow (shadow NG).

FIG. 7B is a simulation diagram of a shadow elimination design of atouch structure provided by at least one embodiment of the presentdisclosure. As shown in the figure, a plurality of spaces 510 on aplurality of parallel metal lines are located on a straight line Lorthogonal to the metal lines, there is no space at the intersectionbetween the metal line 51 between at least two spaces 510 located on thestraight line L and the straight line, and therefore, the shadow problemhas been significantly ameliorated (shadow OK).

FIG. 8 shows a schematic diagram of a touch structure provided by atleast one embodiment of the present disclosure. The right side of FIG. 8shows a schematic diagram of a touch unit in the touch structure, andthe left side of FIG. 8 shows an enlarged schematic diagram of aboundary region between the first touch sub-electrode 411 and the secondtouch sub-electrode 421 of the touch structure; for example, the lightmesh indicates the first metal mesh in the first touch sub-electrode411, and the dark mesh indicates the first metal mesh in the secondtouch sub-electrode 421.

As shown in FIG. 8, in the boundary region between the first touchsub-electrode 411 and the second touch sub-electrode 421, there are aplurality of first spaces 510 a located on the first straight line L1,the plurality of first spaces are respectively located on a plurality offirst metal lines 51 orthogonal to the first straight line L1, and theplurality of first metal lines 51 are parallel to each other, forexample, are parallel to the second direction D2. There is at least onefirst metal line 51 c (two first metal lines circled in FIG. 8) betweenthe at least two first spaces 510 a, and the first metal line 51 cintersects the first straight line L1 and there is no space at theintersection between the first metal line 51 c and the first straightline L1.

Through the setting of the first metal line 51 c, the continuity of theplurality of spaces 510 a located on the first straight line L1 isbroken, and the effect of shadow elimination is effectively achieved.

It should be noted that the above plurality of first spaces all refer tothe spaces between two touch sub-electrodes (such as the first touchsub-electrode and the second touch sub-electrode that are adjacent, twosecond touch sub-electrodes that are adjacent in the first direction,two first touch sub-electrodes that are adjacent in the seconddirection), so as to break the regularity of the arrangement of thelocal spaces.

For example, the first straight line L1 is parallel to the firstdirection D1, that is, the extension direction of the first straightline L1 is the same as the extension direction of the first touchelectrode 410; for example, the first metal line 51 c is parallel to thefirst metal line 51 with a first space; for example, the first metalline 51 c is parallel to the second direction D1. For example, there isno space on the first metal line 51 c.

For example, the first metal line 51 e directly connected to one end ofthe first metal line 51 c has a space, so that the first touchsub-electrode 411 is insulated with the second touch sub-electrode 421;at least one of the first metal lines directly connected to the otherend of the first metal line 51 c does not have a space, so that thefirst metal line 51 c is electrically connected to the main body of thetouch sub-electrode (as shown in FIG. 8, the second touch sub-electrode421) to which the first metal line 51 c belongs.

For example, a shape of the first metal mesh 51 is a polygon thatincludes more than four sides, such as a pentagon or a hexagon. Thisarrangement can diversify the extension directions of the sides of themetal mesh, so that the arrangement of the spaces on the metal line isnot prone to regular continuity. However, this case is not a limitationto the embodiments of the present disclosure.

As shown in FIG. 8, a shape of the first metal mesh is a hexagon; theextension direction of the first metal line 51 e is inclined to theextension direction of the first metal line 51 c; for example, theextension direction of the first metal line 51 e is neither parallel norperpendicular to the first direction D1.

FIG. 9 show a schematic diagram of a touch structure provided by anotherembodiment of the present disclosure, this figure shows a boundaryregion between the first touch sub-electrode 411 and the second touchsub-electrode 421 of the touch structure; for example, the light meshindicates the first metal mesh in the first touch sub-electrode 411, andthe dark mesh indicates the first metal mesh in the second touchsub-electrode 421. The figure shows the first straight line L1. Thedifference between the embodiment shown in FIG. 9 and the embodimentshown in FIG. 8 is that the first metal mesh in this embodiment isquadrilateral, such as rectangular. For specific details, reference maybe made to the description of the embodiment shown in FIG. 8, which willnot be repeated here.

For example, there is also a space in the first metal line 51 inside thefirst touch sub-electrode 411 or the second touch sub-electrode 421,thereby reducing the difference in light reflection between the firstmetal line inside the touch sub-electrode and the first metal line onthe boundary region, and improving the user experience. For example, aspace located inside the touch sub-electrode separates the first metalline into two first metal line segments, and the two first metal linesegments all belong to the same touch sub-electrode.

For example, the density of the spaces inside the touch sub-electrode isequivalent to the density of the spaces at the boundary region, therebyimproving the display uniformity and the process uniformity.

For example, the design rule of the spaces inside the touchsub-electrode is similar to the design rule of the spaces at theboundary region.

For example, the space 510 is located in the middle of the first metalline 51 where the space 510 is located.

The spaces inside the first touch sub-electrode and the spaces insidethe touch sub-electrode of the touch structure provided by theembodiments of the present disclosure will be exemplarily describedbelow with reference to FIG. 8.

For example, as shown in FIG. 8, the spaces of the first metal lineslocated inside the first touch sub-electrode 411 includes a plurality ofsecond spaces 510 b located on the second straight line L2, and theplurality of second spaces 510 b are respectively located on theplurality of first metal lines 51 orthogonal to the second straight lineL2; there is at least one first metal line 51 d between at least twosecond spaces 510 b, the first metal line 51 d intersects the secondstraight line L2, and the first metal line 51 d does not have a space atthe intersection between the first metal line 51 d and the secondstraight line.

For example, the second straight line L2 is parallel to the firstdirection D1.

This arrangement can effectively break the continuity of the spacesinside the touch sub-electrode, thereby achieving the shadow eliminationdesign.

For example, as shown in FIG. 8, inside the first touch sub-electrode411, each first metal mesh has at most two first metal lines that havespaces, thereby ensuring effective electrical connection.

For example, the boundary region between the dummy electrode 430 in thetouch sub-electrode (the first touch sub-electrode or the second touchsub-electrode) and the touch sub-electrode can also be provided with asimilar space design. For example, the plurality of first metal lineslocated in the boundary region between the touch sub-electrode and thedummy electrode respectively includes a plurality of spaces, and eachspace of the plurality of spaces separates the first metal line wherethe space is located into two first metal line segments, one of the twofirst metal line segments belongs to the touch sub-electrode, and theother of the two first metal line segments belongs to the dummyelectrode, so that the touch sub-electrode and the dummy electrode areinsulated. The plurality of spaces includes a plurality of third spaceslocated on a third straight line, and the plurality of third spaces arerespectively located on a plurality of first metal lines intersectingthe third straight line; there is at least one first metal line betweenat least two third spaces, each of the at least one first metal lineintersects the third straight line, and each first metal line of the atleast one first metal line does not have a space at the intersectionbetween the first metal line and the third straight line. For example,the enlarged schematic diagram on the left side of FIG. 8 can beregarded as corresponding to the boundary region (for example, theregion S shown in FIG. 8) between the touch sub-electrode and the dummyelectrode for similar understanding, the dark mesh and the light mesh inthe enlarged schematic diagram are respectively understood as the firstmetal mesh in the touch sub-electrode and the first metal mesh in thedummy electrode, and the first straight line L1 in the figure isunderstood as the third straight line.

This arrangement can effectively break the continuity of the spaces inthe boundary region between the touch sub-electrode and the dummyelectrode inside the touch sub-electrode, thereby achieving the shadowelimination design.

The embodiment of the present disclosure also provides a touch panelincluding the above-mentioned touch structure.

FIG. 10 is a schematic diagram of a touch panel provided by at least oneembodiment of the present disclosure. As shown in FIG. 10, the touchpanel 80 includes a touch region 301 and a non-touch region 302 locatedoutside the touch region 301, and the touch structure 40 is located inthe touch region 301. For example, the first touch electrode 410 extendsalong the width direction of the rectangle, and the second touchelectrode 420 extends along the length direction of the rectangle. Forclarity, the figure does not show the structures of the first touchelectrode and the second touch electrode in detail.

For example, as shown in FIG. 10, the touch panel 80 further includes aplurality of signal lines 450 located in the non-touch region 302. Eachof each first touch electrode 410 and each second touch electrode 420 iselectrically connected to a signal line 450, and is connected to a touchcontroller or a touch integrated circuit (not shown in the figure)through the signal line. For example, the first touch electrode 410 is atouch driving electrode, and the second touch electrode 420 is a touchsensing electrode, however the embodiments of the present disclosure arenot limited to this case.

The touch integrated circuit is, for example, a touch chip for providingtouch driving signals to the second touch electrode 420 in the touchpanel 80, receiving touch sensing signals from the first touch electrode410, and processing the touch sensing signals, such as providing theprocessed data/signal to the system controller to achieve the touchsensing function.

For example, as shown in FIG. 10, the ends of the plurality of signallines 450 connected to the touch integrated circuit may all be arrangedon the same side of the touch region 301 (for example, the lower side inFIG. 10), which can facilitate the connection between the touchintegrated circuit and the plurality of signal lines 450.

For example, as shown in FIG. 10, because the second touch electrode 420is longer than the first touch electrode 410 and has a larger load, inorder to increase the signal transmission speed, a signal line 450 maybe respectively provided at both ends of a first touch electrode 410,during operation, the touch integrated circuit simultaneously inputstouch driving signals (that is, bilateral driving) to a second touchelectrode 420 through two signal lines 450, so that the loading speed ofthe signal on the second touch electrode 420 is increased, therebyimproving the detection speed.

For example, the material of the first metal mesh layer 50 or the secondmetal mesh layer 60 includes metal materials, such as aluminum,molybdenum, copper, silver, or alloy materials of these metal materials,such as silver-palladium-copper alloy (APC) material.

For example, the width of each space (the dimension along the lengthdirection of the metal line) is 5.2 microns.

For example, the material of the insulation layer 70 may be an inorganicinsulation material, for example, the inorganic insulation material is atransparent material. For example, the inorganic insulation material isan oxide of silicon such as silicon oxide, silicon nitride, and siliconoxynitride, a nitride of silicon, or an oxynitride of silicon, or aninsulation material including metal oxynitride, such as aluminum oxideand titanium nitride.

For example, the material of the insulation layer 70 may also be anorganic insulation material to obtain good bending resistance. Forexample, the organic insulation material is a transparent material. Forexample, the organic insulation material is OCA optical glue. Forexample, the organic insulation material may include polyimide (PI),acrylate, epoxy resin, polymethyl methacrylate (PMMA), and the like.

An embodiment of the present disclosure also provides an electronicdevice, and the electronic device includes the above-mentioned touchstructure 40, the above-mentioned touch display panel 20, or theabove-mentioned touch panel 80. For example, the electronic device is atouch display device integrated with a touch function, and the touchdisplay device may be any product or component with a display functionand a touch function, such as: a display, an OLED panel, an OLED TV, anelectronic paper, a mobile phone, a tablet computer, a notebookcomputer, a digital photo frame, a navigator, etc.

FIG. 11 shows a schematic diagram of an electronic device provided by anembodiment of the present disclosure. For example, the electronic device90 is a touch display device, and the touch display device includes atouch panel 80 and a display panel 81, and the display panel 81 and thetouch panel 80 are stacked. The display panel 81 includes a displayregion 802 and a non-display region 801. For example, the display region301 and the touch region 801 are aligned with each other so as tocorrespond to each other, and the non-display region 802 and thenon-touch region 302 are aligned with each other so as to correspond toeach other. The display panel 81 and the touch panel 80 are fixed toeach other by, for example, glue, or are formed integrally, that is, thetouch panel 80 is directly formed on the display panel 81 using thedisplay panel 81 as a substrate.

What have been described above merely are exemplary embodiments of thepresent disclosure, and not intended to define the scope of the presentdisclosure, and the scope of the present disclosure is determined by theappended claims.

1. A touch display panel, comprising: a base substrate, and a displaystructure and a touch structure that are stacked on the base substrate,wherein the display structure comprises a plurality of sub-pixels, theplurality of sub-pixels are arranged along a first direction and asecond direction, and each of the plurality of sub-pixels comprises alight-emitting element and a pixel opening region exposing thelight-emitting element; the first direction and the second directionintersect; the touch structure comprises a first metal mesh layer, thefirst metal mesh layer comprises a plurality of first metal meshesdefined by a plurality of first metal lines, and orthographicprojections of the plurality of first metal lines on the base substrateare located outside orthographic projections of a plurality of pixelopening regions of the plurality of sub-pixels on the base substrate; anorthographic projection of a mesh hole of each of at least one firstmetal mesh on the base substrate covers orthographic projections of twopixel opening regions of two adjacent sub-pixels on the base substrate,and the two adjacent sub-pixels are two first sub-pixels and areconfigured to emit light of a first primary color; and a center distancebetween the two pixel opening regions of the two first sub-pixels issmaller than a center distance between two pixel opening regions of twosub-pixels emitting light of same one other primary color, which isdifferent to the first primary color.
 2. The touch display panelaccording to claim 1, wherein areas of the two pixel opening regions ofthe two first sub-pixels are equal and smaller than an area of a pixelopening region of a sub-pixel that emits light of other primary color.3. The touch display panel according to claim 1, wherein the pluralityof sub-pixels are in a plurality of pixel units, and each of theplurality of pixel units is configured to emit light of full-color; andthe two first sub-pixels belong to two pixel units, respectively.
 4. Thetouch display panel according to claim 3, wherein each sub-pixelemitting light with a color different from the first primary color isconfigured to be shared by at least two pixel units, respectively. 5.(canceled)
 6. The touch display panel according to claim 1, wherein eachof orthographic projections of mesh holes of other first metal meshes,which are directly connected to the at least one first metal mesh, onthe base substrate, covers only an orthographic projection of a pixelopening region of one sub-pixel on the base substrate.
 7. The touchdisplay panel according to claim 1, wherein the plurality of first metalmeshes are arranged along the first direction and the second direction;and each of the plurality of first metal meshes is hexagonal, andextension directions of longest sides of respective first metal meshesare parallel to each other and are all along the second direction. 8.The touch display panel according to claim 7, wherein a pixel openingregion contour of a pixel opening region corresponding to each firstmetal mesh is hexagonal, and six sides of each first metal mesh arerespectively parallel to six sides of the pixel opening region contourcorresponding to each first metal mesh; two sides, which are close toeach other, of two adjacent pixel opening region contours are parallelto each other, and a first metal line is between the two sides; andorthographic projections of the two sides, which are close to eachother, of the two adjacent pixel opening region contours on the basesubstrate are both parallel to an orthographic projection of the firstmetal line on the base substrate, and a distance between one of theorthographic projections of the two sides and the orthographicprojection of the first metal line on the base substrate and a distancebetween other of the orthographic projections of the two sides and theorthographic projection of the first metal line on the base substrateare identical.
 9. The touch display panel according to claim 8, whereinan average line width of the first metal line and a distance between thetwo adjacent pixel opening region contours satisfies a followingrelationship:(PDLGAPmax−PDLGAPmin)*0.5<X<PDLGAPmax*0.167, where X is the average linewidth of the first metal line, and PDLGAPmax and PDLGAPmin are a maximumvalue and a minimum value of the distance between the two adjacent pixelopening region contours, respectively.
 10. The touch display panelaccording to claim 8, wherein the plurality of sub-pixels furthercomprise a second sub-pixel and a third sub-pixel, the second sub-pixelis configured to emit light of a second primary color, and the thirdsub-pixel is configured to emit light of a third primary color, an areaof a pixel opening region of the first sub-pixel, an area of a pixelopening region of the second sub-pixel, and an area of a pixel openingregion of the third sub-pixel sequentially increase; a contour of pixelopening regions of the two first sub-pixels, which are adjacent, is afirst pixel opening region contour, a pixel opening region contour ofthe second sub-pixel is a second pixel opening region contour, and apixel opening region contour of the third sub-pixel is a third pixelopening region contour; and a maximum value of a distance between twoadjacent pixel opening region contours is a distance between a secondpixel opening region contour and a third pixel opening region contour,which are adjacent in a third direction, and the third direction isneither parallel nor perpendicular to the second direction.
 11. Thetouch display panel according to claim 10, wherein a first metal meshcorresponding to the second pixel opening region contour comprises afirst side and a second side, which are adjacent, the first side isneither parallel nor orthogonal to the second direction, and the secondside is neither parallel nor orthogonal to the second direction; thefirst side is between the second pixel opening region contour and thefirst pixel opening region contour, and the second side is locatedbetween the second pixel opening region contour and the third pixelopening region contour; and the first side is longer than the secondside.
 12. The touch display panel according to claim 1, wherein thefirst metal mesh layer comprises a plurality of first touchsub-electrodes and a plurality of first connection electrodes arrangedalong the first direction, the plurality of first touch sub-electrodesand the plurality of first connection electrodes are alternatelydistributed one by one and electrically connected in sequence to form afirst touch electrode extending along the first direction; the firstmetal mesh layer further comprises a plurality of second touchsub-electrodes arranged sequentially along the second direction andspaced apart from each other; and each of the plurality of first touchsub-electrodes and each of the second touch sub-electrodes are spacedapart from each other, and each of the plurality of first touchsub-electrodes and each of the second touch sub-electrodes comprise aplurality of first metal meshes, respectively.
 13. The touch displaypanel according to claim 12, wherein the touch structure furthercomprises a second metal mesh layer, and the first metal mesh layer andthe second metal mesh layer are separated by an insulation layer betweenthe first metal mesh layer and the second metal mesh layer; the secondmetal mesh layer comprises a plurality of second metal meshes defined bya plurality of second metal lines, and orthographic projections of theplurality of second metal lines on the base substrate are locatedoutside the orthographic projections of the plurality of pixel openingregions of the plurality of sub-pixels on the base substrate; the secondmetal mesh layer comprises a plurality of second connection electrodesspaced apart from each other, and each of the plurality of secondconnection electrodes is electrically connected to adjacent second touchsub-electrodes through a plurality of holes in the insulation layer,thereby electrically connecting the adjacent second touch sub-electrodesto form a second touch electrode extending in the second direction. 14.The touch display panel according to claim 13, wherein a plurality ofsecond metal lines of at least two second metal meshes in each of theplurality of second connection electrodes respectively overlap with aplurality of first metal lines of at least two first metal meshes in anadjacent second touch sub-electrode in a direction perpendicular to thebase substrate, so that the at least two first metal meshes have aplurality of vertices overlapping with the at least two second metalmeshes, each of the plurality of holes is at a vertex, and the vertex iscalled a connection vertex.
 15. (canceled)
 16. (canceled)
 17. The touchdisplay panel according to claim 14, wherein the at least two secondmetal meshes are edge metal meshes of the second connection electrode,and the at least two first metal meshes are edge metal meshes of thesecond touch electrode.
 18. The touch display panel according to claim13, wherein adjacent second touch sub-electrodes are electricallyconnected through two second connection electrodes, and the two secondconnection electrodes are spaced apart from each other and aresymmetrical with respect to a central axis extending in the seconddirection.
 19. The touch display panel according to claim 18, wherein anorthographic projection of each of the plurality of first connectionelectrodes on the second metal mesh layer is in a gap between the twosecond connection electrodes between adjacent second touchsub-electrodes; and each of the plurality of first touch sub-electrodesis electrically connected to an adjacent first connection electrodethrough at least one connection line comprising a plurality of firstmetal lines that are sequentially connected end to end.
 20. The touchdisplay panel according to claim 19, wherein the plurality of firstmetal lines that are sequentially connected end to end respectivelyoverlap with a plurality of second metal lines in the second connectionelectrode in a direction perpendicular to the base substrate. 21.(canceled)
 22. The touch display panel according to claim 12, wherein aplurality of first metal lines in a boundary region between a firsttouch sub-electrode and a second touch sub-electrode, which areadjacent, respectively comprise a plurality of spaces, each space of theplurality of spaces divides a first metal line, where the each space islocated, into two first metal line segments, one of the two first metalline segments belongs to the first touch sub-electrode, the other one ofthe two first metal line segments belongs to the second touchsub-electrode, so that the first touch sub-electrode and the secondtouch sub-electrode, which are adjacent, are insulated.
 23. The touchdisplay panel according to claim 22, wherein the plurality of spacescomprises a plurality of first spaces on a straight line, and theplurality of first spaces are respectively on a plurality of first metallines orthogonal to the straight line; and at least one first metal lineis between at least two first spaces, and the at least one first metalline intersects the straight line, and there is no space at anintersection of the at least one first metal line and the straight line.24. (canceled)
 25. An electronic device, comprising the touch displaypanel according to claim 1.